Matrix's flagship client, built by the protocol's creators: Element brings the decentralized open standard for real-time communication to web, desktop, iOS, and Android. Paired with a Matrix homeserver, it delivers Slack-quality team messaging where you own every message, file, encryption key, and byte of metadata. End-to-end encryption is on by default, built on Olm and Megolm - the Double Ratchet algorithm family Signal popularized, extended for large-room scalability and publicly audited by NCC Group. Messages encrypt per-device with cross-signed device verification, so even a compromised server yields nothing readable. Federation is the defining capability: like email, users on different homeservers converse seamlessly, and 30+ bridges connect Matrix rooms to Slack, Discord, WhatsApp, and Telegram, so moving to sovereign infrastructure doesn't sever contact with anyone. Rooms support threads, reactions, file sharing, and voice and video calls via Element Call. The result is digital sovereignty chosen by governments and enterprises across Europe: your data sits on your server in your jurisdiction, portable to any other Matrix host because the protocol is an open standard. Apache-2.0 licensed, with no per-user fees at any scale.

Powering distributed teams seeking full visibility into work patterns and productivity, Ever Teams is an open-source platform unifying time tracking, task management, project coordination, and team collaboration in a single self-hosted application. The real-time timer tracks work against tasks and projects with one-click start/stop, while the Electron desktop app captures periodic screenshots at configurable intervals, monitors keyboard and mouse activity levels, detects idle periods, and syncs offline sessions automatically. Kanban boards with drag-and-drop, calendar views, and daily planning tools organize work across custom statuses, priorities, and sizes. Built-in video conferencing powered by Jitsi or LiveKit enables meetings without leaving the platform. Timesheet management supports submission, review, and approval workflows with configurable time limits and budgets. The backend runs on the Ever Gauzy NestJS platform providing REST and GraphQL APIs, multi-tenant architecture with organization and team scoping, role-based access control, and an integration framework connecting GitHub issues and pull requests bidirectionally plus JIRA import and sync. Infrastructure includes PostgreSQL, Redis for caching and pub/sub, MinIO for S3-compatible storage, Elasticsearch for full-text search, and Cube.js for OLAP analytics. Built with Next.js 16, React 19, Tailwind CSS, and Recoil, with native iOS and Android clients via Expo, Electron desktop apps for Windows, macOS, and Linux, and Plasmo browser extensions for Chrome and Firefox. Internationalization spans 13-plus locales with dark, light, and system themes. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL v3.0 licensed.

Backed by Y Combinator (S24) and processing traces from thousands of AI agents in production, Laminar is the open-source observability platform that treats agent debugging as a first-class engineering discipline rather than an afterthought. Its OpenTelemetry-native SDK auto-instruments Vercel AI SDK, LangChain, OpenAI, Anthropic, Gemini, Browser Use, Stagehand, Mastra, Pydantic AI, and the OpenAI Agents SDK with a single line of code, capturing every LLM turn, tool call, and sub-agent delegation as nested spans with full input/output data and token costs. The Signals engine lets you describe failures in plain language — "agent is stuck in a loop" or "tool returned empty results" — then reads every trace and alerts via Slack when it detects a match. A built-in debugger records runs and replays them from cache so each iteration takes seconds, designed for Claude Code, Cursor, or Codex to drive the repair loop via the MCP server or CLI. Run code-first evaluations in Python or TypeScript locally or in CI/CD pipelines, build datasets from production traces, and query everything with raw SQL through custom dashboards, the in-app editor, or your coding agent. The Rust backend delivers 20x trace compression, a custom real-time streaming engine, ultra-fast full-text search, and gRPC ingestion, while ClickHouse powers columnar analytics and PostgreSQL stores application state. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache 2.0 licensed.

With 6,800 GitHub stars and over a decade of development since its 2014 release, ONLYOFFICE Docs delivers a self-hosted Microsoft Office replacement with pixel-perfect OOXML rendering and real-time collaborative editing supporting both Fast (character-by-character) and Strict (manual save) co-authoring modes. The suite encompasses five full-featured editors — Document Editor for DOCX/ODT/EPUB/HTML, Spreadsheet Editor with 500+ functions and pivot tables, Presentation Editor with animations and transitions, Form Creator for fillable PDF forms with field validation, and PDF Editor for annotation and conversion — all operating within a unified web interface. Format support spans 50+ types including DOCX, XLSX, PPTX, ODT, ODS, ODP, PDF, CSV, RTF, TXT, and Markdown with server-side conversion between any supported pair. The JavaScript plugin API enables extending editor functionality through a marketplace of ready-made plugins for ChatGPT integration, speech-to-text, OCR, Zotero citations, and Thesaurus. Ready-to-use connectors integrate with Nextcloud, ownCloud, Seafile, Moodle, Odoo, Confluence, SharePoint, Alfresco, Liferay, and Chamilo, while WOPI protocol compliance enables integration with any WOPI-compatible platform. JWT authentication secures all API communications between host applications and the document server. Deploy via Docker with a single command or DEB/RPM packages on Ubuntu, Debian, CentOS, or RHEL. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GNU AGPL v3 licensed.

Contracts signed on your own server: DocuSeal is the most feature-complete open-source, self-hosted alternative to DocuSign. A WYSIWYG builder turns any PDF into a fillable form with 14 field types: signature, initials, date, file upload, checkbox, dropdown, radio, stamp, and more. Documents route to multiple submitters in sequence or parallel, with automated SMTP email notifications, reminders, and a mobile-optimized signing experience that works on any device without an account. Every completed document carries an automatic PDF eSignature with verification and an audit trail. Templates are reusable and can also be generated programmatically - from HTML via API or from PDFs and DOCX files with embedded field tags - and the REST API plus webhooks drive full workflow automation, with embedded signing forms and form builders for React, Vue, Angular, and plain JavaScript. Files store on disk or in S3, Google Cloud Storage, or Azure. The UI ships in 7 languages with signing in 14. Runs on SQLite, PostgreSQL, or MySQL; AGPL-3.0 licensed with unlimited documents and no per-signature fees.

neTV turns any Xtream Codes or M3U IPTV subscription into a clean, fast player that you host yourself and open from a browser, iPhone, iPad, Apple TV, Mac, or Chromecast. The EPG grid guide shows what is on now and next, and catchup lets you browse earlier listings, replay a program from the beginning, or start over a show already airing, with timeline seeking whenever your provider keeps an archive. Intelligent Handoff lets you switch off the living room TV mid-match and resume on your phone from the exact moment you stopped, because the server keeps the stream going until the program ends. Movies and series arrive with metadata, seasons, episodes, and resume points, while search accepts regular expressions and favorites support drag-and-drop ordering alongside playlists that you build on the web and see in every app. Smart passthrough remuxes h264 and AAC streams without re-encoding, and NVENC or VAAPI hardware transcoding serves low-latency HLS to clients that need it. Owners of an NVIDIA GPU can switch on real-time 4K AI upscaling that lifts 1080p channels above 70 frames per second on an RTX 5090. A separate gateway port exposes your live sources as an Xtream-compatible endpoint for other native players, with per-user source access and stream limits. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache 2.0 licensed.

Self-hosted and built around long reading, Omnivore saves articles, newsletters, and PDFs, renders web pages as clean text, remembers your place, and keeps every highlight searchable. Pages arrive from the web app's Add button or from Chrome and Firefox extensions that authenticate with an API key. Newsletters arrive through generated email addresses once an IMAP watcher or another mail bridge is set up. PDFs open in the same reader and accept highlights and notes just like articles. Labels, saved searches, and filters such as subscription:"Name" make a big library easy to slice. The RSS section follows your feeds, lets you add a story to the library or hide it, and can sort stories into topics when an OpenAI key is configured. Custom extractors scroll lazy-loaded pages, follow paginated articles, and strip pop-ups before saving. Rules trigger webhooks when pages are created or updated, which suits automatic labelling and other custom workflows. E-ink reading settings add double-tap page turns and volume-button scrolling, and Android and iOS apps sync the same library. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

OpenPencil is the open-source design editor that reads and writes native Figma .fig files using the same Kiwi binary format — enabling bidirectional copy-paste between Figma and OpenPencil without data loss. The built-in AI assistant provides 90+ design tools through a chat interface, creating and modifying shapes, fills, strokes, auto-layout, components, variables, and boolean operations from natural language prompts, with BYOK support for Anthropic, OpenAI, Google AI, OpenRouter, Z.ai, MiniMax, and compatible endpoints. A Skia CanvasKit WASM renderer paired with Yoga WASM layout engine delivers Figma-parity rendering with flex and CSS Grid support including gap, padding, and alignment. The headless CLI inspects node trees via XPath queries, lints naming and accessibility, converts between document formats, analyzes color and typography patterns, extracts design tokens, and exports to PNG, SVG, JSX/Tailwind, and HTML. An MCP server exposes all design operations over stdio and HTTP, connecting Claude Code, Cursor, Windsurf, and Gemini CLI for AI-assisted design automation. Real-time P2P collaboration via WebRTC with Yjs CRDT synchronization requires no server and no account. The Vue SDK provides headless components for embedding the editor into custom applications. Ships as a 7 MB Tauri v2 desktop app for macOS, Windows, and Linux, or runs in any browser as a PWA. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Open Agent Builder delivers a visual canvas for orchestrating AI agent workflows without writing Python scripts or managing complex codebases. The React Flow-powered drag-and-drop interface supports seven node types — Agent, Scraper, Transform, If/Else, Loop, User Approval, and MCP Tool — each configurable with provider-specific settings for Anthropic Claude (Haiku 4.5 and Sonnet 4.5), OpenAI GPT-5, Groq, or any OpenAI-compatible endpoint. The LangGraph orchestration engine handles state management, conditional routing, and human-in-the-loop approval gates while Firecrawl integration converts any website into structured, LLM-ready data through scrape, crawl, and map operations. E2B sandboxed code execution powers Transform nodes for secure data manipulation without risking host system integrity. Real-time streaming updates show execution progress node-by-node as workflows run, with Convex providing reactive database synchronization for workflow state and execution history. The TypeScript-first architecture (96.8% TypeScript) built on Next.js 16 App Router with Tailwind CSS delivers a responsive interface across devices. Clerk handles multi-user authentication with JWT integration for secure workspace isolation. Deploy via npm install and environment configuration with Firecrawl, Convex, and Clerk API keys. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

From a PDF plan set to a waste-adjusted material order takes one browser tab: OpenTakeoff measures floors, walls, and fixtures at the drawn scale and never uploads a single drawing. Drag in a PDF, image, or zip plan set, view up to four sheets side by side, and search sheet text, while stitching joins floors split across a match line. Scale comes from the drawn scale note or a known dimension, and a check tool reports percent error before a wrong scale can skew a bid. Area, linear, and count tools carry condition colors, CAD hatches, waste percentages, and wall heights, and a marquee over the architect's finish schedule turns approved rows into conditions. Supporting materials convert coverage rates into rounded-up order quantities, and roll-goods mode lays out lanes, seams, and cuts to scale. Totals in SF, SY, LF, and EA export to CSV, JSON, Excel, print, or a marked-set PDF, while named revisions compare addenda as quantity deltas. Highlighters, revision clouds, callouts, and notes mark up sheets on a layer that is never counted, and dimension lines label measured lengths at the sheet scale. An MCP server with more than 50 tools lets AI agents open plans, set scale, and measure rooms, and each shape they draw stays a dashed proposal until a person accepts it. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Conference rooms, equipment, boats, and even people can be reserved through LibreBooking, a self-hosted scheduler that keeps double bookings off the calendar. Schedules define bookable time slots with custom layouts and seasonal availability, while each resource carries its own minimum and maximum duration, buffer time, lead time, capacity, and optional approval step. Check-in and check-out can release unclaimed slots automatically, and blackout times close resources for maintenance. Quotas stack limits by hours or reservation count, credits meter peak and off-peak usage, and users can buy credits through Stripe or PayPal. Accessories such as projectors or chairs ride along with a booking under their own quantity limits. Groups carry application, group, resource, and schedule administrator roles, and custom attributes extend reservations, resources, and users with text, dropdown, date, or checkbox fields. Reports can be charted, exported to CSV, printed, or emailed, and public resources publish RSS and iCalendar feeds for Outlook and Thunderbird plus an embeddable calendar snippet. A tablet view beside a door shows live availability for on-the-spot booking, a monitor view fills lobby screens, and a Slack command starts a reservation. Sign-in options include LDAP, Active Directory, OAuth2, and SAML, and the REST JSON API automates bookings. Users can join waitlists, request reminder emails, and accept terms of service before booking, while six color themes restyle the interface. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-3.0 licensed.

Podcast enthusiasts and homelab archivers automate digital episode preservation and stream personal audio feeds using PodFetch, an open-source self-hosted podcast manager that combines scheduled RSS downloads, Podcasting 2.0 transcript indexing, and browser playback into a modern listening platform. Listeners can subscribe to international podcast channels through direct feed URLs, Apple Podcasts directory searches, or bulk OPML subscription imports, configuring background polling timers to download new releases automatically upon publication. The integrated audio player supports variable speed playback, episode bookmarks, listening histories, and fullscreen visualization modes directly inside responsive desktop and mobile browser sessions. Advanced search capabilities leverage Podcasting 2.0 synchronized transcripts and automated speech-to-text generation via OpenAI-compatible Whisper APIs, allowing collectors to run full-text keyword searches across every spoken phrase in their audio archive. Built-in GPodder API synchronization maintains subscription lists and playback positions across popular smartphone apps like AntennaPod and native companion clients without relying on commercial cloud accounts. Server operators can assign multi-user accounts with private favorites lists, export customized RSS aggregation streams, and route storage paths between fast solid-state drives and large secondary mechanical hard disks. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.

A Node.js server, a large shared canvas, and a URL - WBO (Whiteboard Ophir) is collaborative whiteboarding reduced to its essence. There are no accounts and no setup - to collaborate, you send someone the board's link, and every stroke appears for all connected users in real time over WebSockets, with cursor positions shared so you can see where collaborators are working. Board state persists automatically and continuously, so a diagram drawn in today's lesson is still there next week at the same URL. Boards come in three flavors: a public free-for-all, private boards with random unguessable names, and named boards with custom URLs shared by anyone who knows the name. The tools cover teaching and brainstorming needs - pencil, straight lines, rectangles, ellipses, text annotations, eraser, a full color palette with brush sizes - and boards export as SVG or PNG. Despite the simplicity, the server is production-minded: JWT authentication gates board access with granular capabilities (open, edit, and clear as separate permissions), rate limiting caps per-client message volume, reverse-proxy and subpath deployment are supported, and OpenTelemetry provides metrics, logs, and traces. It works on tablets and touch devices, speaks multiple languages, and consumes minimal resources. AGPL-licensed.

Execute comprehensive multi-angle investigations across scientific journals and web repositories using Local Deep Research, an autonomous intelligence engine designed for researchers, analysts, and knowledge workers. Users can submit complex analytical questions through a self-hosted web console to initiate agentic research cycles powered by LangGraph workflows. The application dynamically queries search providers including SearXNG, arXiv, PubMed, Wikipedia, and Google, iteratively evaluating discovered content to formulate targeted follow-up queries. Discovered academic papers and web sources can be indexed into an encrypted personal library to combine internal documentation with external search intelligence. Reports are synthesized with structured outlines, section headings, and verifiable academic citations that link directly to source references. Individual research sessions, system logs, and user credentials remain isolated in per-user SQLCipher databases protected by AES-256 encryption. Automated subscriptions deliver scheduled news digests and topic monitoring summaries directly to connected notification channels. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Backed by 9,200 GitHub stars and venture funding led by Nauta Capital, Nhost is the open-source Firebase alternative that replaces Google's proprietary document store with a relational PostgreSQL foundation from day one. The Hasura integration auto-generates a real-time GraphQL API with subscriptions, role-based permissions, and remote schemas from your PostgreSQL tables, while event triggers and cron triggers automate backend workflows without custom infrastructure. Authentication supports email and password, magic links, phone OTP via SMS, social OAuth providers including Google and GitHub, WebAuthn for passwordless login with Face ID, fingerprints, and YubiKeys, plus two-factor authentication. Since the Q1 2026 release, Nhost Auth also functions as a full OAuth2 and OpenID Connect provider, allowing your Nhost project to issue tokens to third-party applications the same way GitHub or Google do. The S3-compatible storage service handles file uploads with automatic image optimization, virus scanning, and presigned URLs for secure direct downloads. Node.js serverless functions deploy JavaScript and TypeScript backend logic without managing servers, while the Nhost CLI spins up the complete local stack via Docker for development with automatic database migration tracking and Hasura metadata management. The MCP server integration exposes project documentation and data schemas to AI assistants for intelligent query building. SDKs cover JavaScript, TypeScript, React, Vue, Next.js, and Dart for Flutter. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Pastefy gives developers a self-hosted pastebin and GitHub Gist workspace where multi-file code snippets, Mermaid architecture diagrams, and terminal recordings can be shared in a single click or cURL command. Its multi-tab editor highlights syntax across more than 200 programming languages so you can bundle scripts, configuration files, and documentation inside one URL. Markdown notes render cleanly. SVG graphics, CSV tables, GeoJSON maps, unified diffs, calendar events, regex testers, and Asciinema `.cast` terminal sessions all preview interactively in the browser. Sensitive snippets stay locked behind client-side AES password encryption, automatic expiration timers, and public, unlisted, or private visibility controls. Authenticated users organize pastes into nested folders, fork community snippets, generate QR codes or styled code screenshots, and embed interactive viewers into external docs. Command-line users pipe output directly via `curl -F [email protected]`, manage pastes from VS Code or Raycast extensions, and automate workflows through the REST API v2 with official JavaScript, Java, and Go SDKs. Single sign-on supports GitHub, Google, Discord, Twitch, and custom OpenID Connect providers. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

With over 48,000 GitHub stars and monthly releases since March 2023, LocalAI is the self-hosted AI engine that replaces every OpenAI endpoint with a single Docker container running on your own infrastructure — serving chat completions, image generation, text-to-speech, speech-to-text, embeddings, vision, video generation, and function calling through identical API schemas that require zero application code changes. The composable backend architecture isolates each inference engine as a separate gRPC service running in its own OCI container, so llama.cpp, vLLM, SGLang, transformers, whisper.cpp, diffusers, MLX, Stable Diffusion, and Flux install on demand without touching the core, can run on separate machines, and a fault in one never affects others. Hardware acceleration spans NVIDIA CUDA 12 and 13, AMD ROCm, Intel oneAPI/SYCL, Apple Silicon Metal, Vulkan, and NVIDIA Jetson L4T — or runs entirely on CPU without any GPU. Built-in AI agents support autonomous tool use, retrieval-augmented generation, Model Context Protocol integration, and skill-based workflows directly in the web interface. The model gallery provides curated YAML configuration files for hundreds of models that install with a single command, while P2P federated inference distributes model shards across multiple machines for running models larger than any single node's memory. Multi-user API key authentication with quotas and role-based access enables team deployments. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Instead of querying a private registry with curl and its HTTP API, open Docker Registry UI and click through repositories, tags, digests, and layers in a browser. The catalog groups images by namespace, shows tag counts, and filters as you type in the search bar, which Ctrl+F or F3 focuses. Each repository's tag list shows creation date, size, content digest, and CPU architecture, sorts numerically, and copies a ready-made pull reference with one click. A history page expands any tag into its operating system, entrypoint, environment variables, exposed ports, and layer-by-layer build steps, and a Dockerfile view reconstructs the file from those steps. The same view also covers multi-architecture images and OCI Helm exports. When the registry allows deletion, tags go one at a time or in bulk with checkboxes, Alt+Click for a whole page, and Shift+Click for a range. One interface can switch between several registries from its menu, or be locked to a single registry with your own title. Basic authentication passes through the browser, and a built-in proxy option forwards requests to your registry container so CORS needs no configuration. Light, dark, and automatic themes come with color variables for custom branding, and a weekly notice announces newer releases. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.