Yoga studios, comedy clubs, choirs, and bands use Revel to sell tickets, memberships, and season passes from their own server with no platform fee. Studios and clubs sell monthly or yearly memberships through Stripe and offer series passes that cover a class pack, a course, or a season, with wallet cards that a door scan verifies. Venues design seat maps with sectors, individual seats, and accessible seats, and buyers pick seats on an interactive map while the seats are held at checkout. Bands and DJs sell their own shows with no promoter in between, set pay-what-you-can tiers, open presales to invitation-link holders, and export every buyer's name and email. Communities that vet who comes screen requests with questionnaires reviewed automatically, manually, or both, and keep private guest lists, invitation-only events, and a fuzzy-matched blacklist. Buyers check out a multi-tier cart without an account, using discount codes and fixed-price, free, or pay-at-the-door tiers. Tickets arrive as QR PDFs or Apple Wallet and Google Wallet passes, and door staff check guests in by scanning. Organizers run waitlists with time-limited offers, announcements, reminders, and a Telegram bot for RSVPs and invitations. Revenue and VAT reports export as XLSX or PDF, and VIES checks buyer VAT IDs. The web app speaks English, German, Italian, French, Spanish, and Portuguese. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Organizers running sports leagues, gaming tournaments, and community athletics can deploy Bracket as an open-source competition control hub that coordinates multi-stage events without recurring SaaS subscription fees. Competition directors can configure multi-tier tournament topologies combining single elimination, double elimination, round-robin pools, and dynamic Swiss format brackets within a unified event schedule. An interactive calendar grid enables operators to drag and drop fixtures between designated courts, assign start times, and balance player recovery intervals across multiple playing areas. Public dashboard displays generate real-time match outcomes, court assignments, and standings boards that spectators can monitor on mobile devices or overhead venue monitors with customized team logos. Club administrators can manage multiple regional athletic organizations, register rosters through bulk CSV spreadsheet imports, and coordinate simultaneous divisions spanning amateur and championship flights. Integrated OpenAPI REST endpoints allow external scoring overlays, live stream graphic generators, and automated result bots to query match statuses or submit verified referee scorecards programmatically. 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.

Workplace and Yammer's pattern on your own server, with GDPR compliance by construction rather than contract: HumHub is an open-source enterprise social network from Germany. Built in PHP on Yii2, it organizes everything around four concepts. Users get rich profiles with follows and interactions. Spaces are the structural unit - rooms for departments, projects, events, or clubs, with per-Space permissions, notification settings, and email summaries, and operators can auto-map users into the right Spaces. Content covers posts, wiki pages, photos and video, events, and tasks, with multi-level comments, versioning, archiving, moderation reporting, and filterable full-text search across everything. Modules make it a platform: roughly 80 install-and-activate extensions including Calendar, Wiki, Polls, Tasks, Gallery, News, direct-message Mail, OnlyOffice document editing, Advanced LDAP, SAML and JWT SSO, a RESTful API, mass user import, Translation Manager, and a Theme Builder with custom pages - every one optional and toggleable at runtime. That module economy is why HumHub serves such varied deployments: corporate intranets, city governments, universities, political parties, and nonprofits all configure the same core differently. Requirements are a plain LAMP stack - PHP 8.1+ and MySQL/MariaDB - making it one of the easiest community platforms to operate long-term.

If an assembly needs motions, amendments, speaker lists, and secret ballots on one shared screen, OpenSlides is the open-source web application that runs them. Before the meeting, administrators set up committees and meetings, import participants from CSV or connect a SAML identity provider for single sign-on, email invitations with login data, and sort people into groups with freely defined rights. Members file motions in an HTML editor, attach documents, gather supporters, and send them through customizable workflows with automatic numbering by category, and amendments and change recommendations attach to specific line numbers. Motions can be forwarded to other meetings. During the session the agenda reorders by drag and drop, and every item, motion, or election gets its own speaker list with countdowns, points of order, and recorded speaking time. Votes are open, secret, or nominal and run live for present participants in voting groups, with proxy delegation, vote weighting, multiple rounds, and Yes/No/Abstain options per candidate or list. Results appear against a chosen reference value on projectors, in PDF exports, or as individual tallies. Several projectors can show the current item, a lower third for the active speaker, and live results, and Autopilot guides participants through whatever is happening. A video livestream brings in remote attendees. Afterward, motions export to PDF, CSV, or XLSX. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Created by Jeff Atwood, co-founder of Stack Overflow, and battle-tested for over a decade with 47,600+ GitHub stars, Discourse powers community forums for GitHub, Docker, Rust, Netlify, and thousands of organizations worldwide. The platform combines long-form threaded discussion with built-in real-time chat, enabling communities to move fluidly between asynchronous conversations and live interaction. Five automated trust levels progressively unlock permissions — posting links, editing wiki posts, flagging content, and moderating — based on reading time, post count, and community engagement, reducing spam and abuse without manual intervention. The Discourse AI plugin integrates with OpenAI, Anthropic, and self-hosted HuggingFace endpoints for automated topic summarization, sentiment analysis, semantic search, and AI-assisted content triage. Over 200 official and community plugins extend functionality with features like the Data Explorer for ad-hoc SQL queries against the forum database, polls, solved-topic marking, voting, calendar events, and custom user fields. SSO and OAuth support connects Google, Facebook, Apple, GitHub, and SAML identity providers, while reply-by-email and mailing list mode let users participate entirely through their inbox. The Ember.js single-page frontend delivers responsive performance across all devices with PWA support and web push notifications. Deployment uses Docker via the official discourse_docker launcher with automatic Let's Encrypt HTTPS, resource scaling based on server hardware, and support for single-container or multi-container configurations. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL v2.0 licensed.

CRMs, project trackers, inventory tools - NocoBase is an open-source no-code/low-code platform for building business systems like these. Its architecture is data-model driven: you define collections and relationships first, then compose any number of interface blocks (tables, forms, kanban, charts) on top of the same model, so data structure is never coupled to a particular view. The core is a microkernel where every feature is a plugin, WordPress-style; you enable official plugins, install marketplace ones, or write your own as npm packages with server and client parts. Data sources include the main PostgreSQL or MySQL database, external databases, and third-party APIs - so you can build admin panels over existing production data instead of migrating it. Built-in infrastructure covers role-based permissions down to collection, record, and field level, workflow automation with approval steps and scheduled triggers, and audit logs; a one-click switch flips between usage and configuration modes. Because custom features live in isolated plugins with a documented lifecycle, core upgrades do not overwrite your customizations, and swapping UIs never requires data migrations since interfaces sit on independent models. Written in TypeScript on Node.js, Koa, and React under the AGPL license, it is light enough for one person to run and extend - and where no-code SaaS platforms charge per seat and per app, a self-hosted instance runs unlimited applications for unlimited users at hosting cost alone.

With 7,400+ GitHub stars, 280+ contributors, and 99 releases spanning 15 years of active development since 2011, Dolibarr is the modular ERP and CRM platform that scales from freelancers tracking invoices to manufacturing companies managing full production workflows — all within a single PHP application requiring only a web server and database. Enable exactly the modules your business needs: CRM with leads, proposals, and online contract signing; invoicing with customer and supplier management, credit notes, and SEPA direct debit; double-entry accounting with bank reconciliation and margin analysis; stock and warehouse management with barcode scanning, batch and lot tracking, and product variants; bill of materials and manufacturing orders with workstation scheduling; HR with employee records, leave management, expense reports, recruitment pipelines, and timesheets; project and task management with shared iCal calendars; and a ticket system with integrated knowledge base for customer support. TakePOS provides a touch-optimized point-of-sale interface for retail shops, bars, and restaurants with floor and table management, QR code self-ordering, automatic stock decrements, and Stripe terminal integration. Payment processors connect via PayPal, Stripe, and Paybox. The marketplace offers over 1,000 third-party add-ons, and the low-code Module Builder enables custom extensions without programming. Deploy via the official Docker image with MariaDB, DEB and RPM packages for Linux, or manual installation on any PHP-capable server. 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.

Roughly 40 integrated business apps forming a full ERP: Odoo's open-source suite runs companies end to end. The Community Edition, licensed LGPL-3.0, ships roughly 40 apps covering CRM, sales, invoicing, basic accounting (journals, chart of accounts, taxes, reconciliation), inventory and warehouse management with multi-step routes, manufacturing with BOMs and work orders, purchasing, project management, timesheets, HR, a website builder, and eCommerce. Each app works standalone, but they share one PostgreSQL database and one data model, so a confirmed sale updates stock, triggers procurement, and posts invoices without integration glue. The modular design means you enable only the apps you need and extend with 40,000+ community modules from the Odoo app store covering nearly any vertical requirement. Inventory supports multi-warehouse stock, reordering rules, and lot and serial tracking with barcode-ready operations; manufacturing ties BOMs, work orders, and work-center routing directly to sales demand and stock levels; and the website builder sells straight from your product catalog with payment provider integrations. You can start with just CRM and invoicing on day one and switch on inventory or eCommerce later - new apps integrate with existing data instantly because the schema is shared. The server is Python with an XML/JavaScript view layer, and because data lives in plain PostgreSQL there is no proprietary format: you can query, back up, migrate, and extend business data directly, with unlimited users and no per-seat licensing - where enterprise ERP pricing is per user per month, headcount here costs nothing.

From the call for abstracts to the badge handed over at the registration desk, Indico handles every step of running a conference, plus the weekly meetings and one-off lectures that fill the calendar around it. Events live in a nested tree of categories, and access rules can be set per category, event, session, or single contribution, with custom roles inside each event. Speakers submit abstracts, track reviewers score them against questions the organizers define, judges accept or reject them, and accepted talks become contributions that sit in a drag-and-drop timetable of color-coded sessions. Registration forms are assembled field by field, carry fees, and take payment through PayPal, Stripe, or SIX Payment plugins; attendees get QR-coded tickets, and a badge editor prints name tags for the whole room. A paper reviewing workflow collects full papers. Meeting pages keep minutes and slide decks attached to the talk they belong to. The room booking module adds approvals, recurring reservations, and audiovisual equipment, and the Zoom plugin creates online sessions straight from an event page. Calendar views span a month, week, or day, filter by category, and export to iCal for subscriptions. Scripts pull event data from the HTTP export API as JSON or XML with personal API tokens. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Hi.Events is an alternative to Eventbrite, Tickettailor, and Dice.fm, eliminating per-ticket platform fees entirely when self-hosted. Event organizers create fully brandable event pages supporting paid, free, donation, and tiered ticket types with recurring and multi-date scheduling, sold-out waitlists that automatically release tickets when spots open, and product add-ons with category organization. Stripe Connect integration processes payments directly to the organizer's bank account with instant payouts, while offline payment methods support cash and invoice scenarios. Promo codes offer fixed or percentage discounts with usage limits, expiry dates, and promo-gated hidden tickets for VIP access. QR code check-in enables fast door scanning with multiple check-in lists, scan logs, and real-time attendance tracking across entry points. Custom checkout questions collect attendee information beyond standard fields, with advanced search, filtering, CSV and XLSX export, full and partial refunds, and bulk attendee messaging. The analytics dashboard tracks daily sales, revenue, tax breakdowns, product performance, and promo code usage with exportable reports, while affiliate tracking assigns custom codes to promoters with tracked sales data. Multi-user roles control organizer permissions, automatic invoicing generates receipts, and the REST API ships with interactive OpenAPI documentation. 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.

Pretix powers thousands of events and millions of ticket sales through a fully brandable ticket shop with interactive seating plans, 30+ payment providers, and a mobile check-in app for venue entry management. With over 2,400 GitHub stars, it delivers what organizations need when they demand full control over attendee data and revenue rather than surrendering margins to Eventbrite or Ticket Tailor. Built with Python and Django on PostgreSQL with Redis and Celery, the ticket shop adapts to your colors, logo, and domain with responsive design. The graphical seating plan editor handles everything from small cinemas to large stadiums, letting buyers choose seats mapped to pricing categories. Payment providers connect through plugins including Stripe, PayPal, Mollie for iDEAL and Bancontact, SEPA direct debit, and bank transfer with automatic CSV import for payment matching. The voucher engine generates bulk discount codes with usage limits, quota reservations, and automated email distribution. Waiting lists automatically offer released tickets to the next registrant with expiration deadlines. A built-in mini-CMS hosts event descriptions, terms of service, and static pages directly in the ticket shop. Customer accounts enable repeat buyers to check out faster across events. The pretixSCAN mobile app performs QR code check-in on Android and iOS with offline capability. Embeddable JavaScript widgets integrate the shop into any website. Plugin architecture extends functionality with output formats, analytics, and Apple Wallet passes. Deploy via Docker with the pretix/standalone image alongside PostgreSQL and Redis. 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.

Get ready to transform your audience into a thriving empire with Ghost, the ultimate toolkit for the modern creator on a mission to monetize their mojo. Picture this: a sleek website that screams 'you', bursting with content that captivates, newsletters that fly straight into inboxes, and a subscription service that turns followers into financiers. Wave goodbye to bland and hello to a smorgasbord of stunning, free themes that you can finesse to fit your unique flair. But wait, there's more! Ghost's editor is like the Swiss Army knife for content connoisseurs—slick, sophisticated, and oh-so-simple to use. Unleash your creativity with multimedia storytelling that includes everything but the kitchen sink—galleries, chucklesome gifs, videos, podcasts, you name it. And when it's time to hit 'send', those built-in newsletters make sure your words woo your audience without breaking a sweat. Want to play the mysterious type? Ghost's got you covered with native signup forms that turn casual lurkers into committed members. And because we all love a good sneak peek, Ghost dishes out the deets with analytics that spill the tea on who's loving your work the most. Plus, with tantalizing offers and promotions, you'll have new subscribers flocking like seagulls at a beach picnic. All this, hosted on RepoCloud, where the cost is as tiny as your chances of being bored. So, what are you waiting for? Let's Ghost!

Take the tool sales teams use to never forget a client detail and point it at the people who actually matter - friends, family, the colleague whose kid's name you keep blanking on: Monica is a personal CRM. It's a Laravel/PHP application over MySQL where each contact accumulates the texture of a real relationship: how you met, family members and pets, work changes, addresses, notes from conversations, activities done together, gift ideas and gifts given, even debts owed in multiple currencies. Two features set it apart from every contact app. Reminders with staying power: set per-contact intervals (weekly through yearly), get notified at 30 days, 7 days, and day-of, with automatic birthday reminders and CalDAV sync to your calendar. And a journal linked to contacts: write about dinner with friends, tag each person, and build a timeline that's part diary, part relationship log - plus a daily "how was your day" rating. Monica is deliberately manual and deliberately private: no social network features, no AI, no email scraping, no ads, no analytics - a quiet database of what you know about people you love, on your own server. Multiple vaults and users, labels, custom activity types, and document/photo uploads round it out. AGPL-licensed.