Shelf answers the three questions every equipment manager dreads — who has it, where is it, and when is it coming back — using QR-code-first tracking where every asset gets a unique scannable label, every handover is logged with timestamps and e-signed custody agreements, and every scan captures GPS coordinates displayed on a map. Built on React Router 7 with React 19, TypeScript 5, Prisma 6 ORM, and Tailwind CSS 3 with Radix UI components, the platform generates QR codes and barcodes (Code128, Code39, Datamatrix) printable on DYMO, Brother, and Zebra label printers. The custody system records every handover with user details and generates PDF custody agreements with e-signatures for high-value items, while a complete audit trail tracks responsibility from check-out to return. The visual booking calendar prevents double-bookings automatically, supports partial check-outs and returns with segmented lifecycle bars, and handles quantity-tracked consumables alongside individually serialized equipment. Asset Models enable bulk creation of identical items with shared defaults while maintaining individual QR codes and custody histories. Location tracking displays last-scanned GPS coordinates on MapTiler maps. Supabase Auth provides email and SSO authentication, pg-boss handles background job queuing, and Nodemailer delivers SMTP email. The Shelf Companion app on iOS and Android enables field scanning and bookings. Export Asset Inventory, Asset Distribution, and Custody Snapshot reports for compliance. Deploy via Docker with PostgreSQL and Supabase. 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.

Service businesses get a booking page without per-booking commissions or monthly SaaS fees from Easy!Appointments, the self-hosted appointment scheduler. Customers pick a service, provider, and open time slot from a clean web form; the system enforces working plans, breaks, and booking rules you define per provider, then confirms by email to both sides. The structure fits real service organizations: multiple providers with individual schedules, multiple service types with their own durations and prices, and admin/secretary roles for front-desk management. Two-way Google Calendar synchronization keeps each provider's external calendar authoritative - book in Easy!Appointments and it appears in Google Calendar, block time in Google and the slot disappears from the booking form. Version 1.6 adds SMS notifications and payment support, and a REST API opens the scheduling data to custom integrations. Built on PHP (CodeIgniter) with MySQL, it installs in a single folder and can share a database with your existing site; a WordPress plugin embeds the booking form directly in pages or posts. The interface ships in dozens of languages with time-zone handling throughout. GPL-3.0 licensed and free for commercial use - a helpdesk, clinic, salon, or consultancy runs its whole booking workflow on its own server.

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.

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.

With over 37,800 GitHub stars and active development since its first release in 2008, ERPNext is the most-starred open-source ERP system — delivering accounting, inventory management, manufacturing, CRM, project tracking, asset management, HR, and point-of-sale capabilities through a unified web interface built on the Frappe Framework's metadata-driven architecture. The accounting module handles multi-company consolidation, multi-currency transactions, tax templates for GST and VAT, bank reconciliation, and automated journal entries with real-time profit and loss, balance sheet, and cash flow reporting. Manufacturing covers production planning with multi-level bill of materials, work order scheduling, capacity planning, subcontracting, and quality inspection at each production stage. Inventory tracks stock across multiple warehouses with batch and serial number tracing, automatic reorder levels, landed cost calculations, and perpetual inventory valuation using FIFO or moving average methods. The CRM module manages leads, opportunities, and customer communication with email integration, while project management tracks tasks, timesheets, and Gantt-based scheduling with budget controls. Custom applications extend functionality through the Frappe ecosystem without forking the core codebase, and the REST API enables integration with payment gateways, shipping providers, and third-party services. Deployable via Docker Compose or the bench CLI tool with MariaDB and Redis. 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.

In Tryton, an invoice knows its shipment and a production order knows its stock, since accounting, inventory, purchasing, and sales are modules of one ERP rather than separate programs exchanging exports. Financial accounting posts customer and supplier invoices, reconciles bank statements imported from SEPA or configured CSV formats, manages dunning and direct debits, and produces Factur-X electronic invoices, while analytic accounting splits results across cost centers. Stock tracks goods through warehouses and locations with lots, shipments, inventories that warn when counts drift beyond tolerance, and automatic period closing, and production consumes bill-of-material inputs into finished goods with quantity checks. Sales quotations become orders, shipments, and invoices without retyping; purchases calculate real supplier lead times; point of sale records lot numbers at the till; subscriptions bill recurring services on schedule. Multi-company installations share the same database with per-company wizards, tax rules can be defined per organization for European trade, and parties, products, carriers, currencies, and customs duties are managed as shared reference data. Access happens through the browser web client, a desktop client, or scripting and REST libraries, so integrations read and write the same business objects your staff see. 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-or-later licensed.

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.

MyCompany runs the whole back office of a small business, sales, stock, production, invoices, projects, payroll, and the shop till, as one application sharing one database. A lead arrives and moves across a kanban board with calls and emails logged on its card, then becomes a sales order and an invoice without retyping a single field. Purchasing raises supplier orders, receives goods into the right warehouse, and watches stock move between locations with full movement history, reservations, lots, and serial numbers. Manufacturing plans production orders from bills of materials with operations and work centers, tracking the materials actually consumed and what each finished batch cost. Projects track tasks and time with supervisor timesheets, HR keeps employee records, hourly rates, and payslips, and the retail point of sale handles barcodes, payments, register sessions, and discounts. Because every module reads and writes the same records, the invoice knows what the warehouse shipped and the project knows what the customer was billed. When your business outgrows a standard screen, customizations live in separate extension modules, so vendor updates never collide with the workflows you adapted. 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.

Your next business system does not need a year of scaffolding: Open Mercato hands you a running CRM, ERP, and commerce back office, and your team builds only the logic that makes your company different. Deals and pipelines live next to the product catalog, so a quote pulls real variants, price lists, and stock without swivel-chair exports. Orders flow into invoices, shipments, and payments in one motion, while warehouse lots and stock movements keep fulfillment honest about what can actually ship today. Customers and partners stop emailing your team for status: the self-service portal takes B2B orders, shows tracking, and files warranty claims directly. When a record needs a field nobody planned for, an administrator adds the custom entity from the panel, no migration deploy, and shapes its lifecycle with per-tenant workflows and business rules. Every change lands as an auditable command with an author attached, so mistakes get undone, sensitive columns get encrypted per tenant, and several companies share one install without seeing each other's data. Storefronts and mobile apps plug into generated REST APIs with OpenAPI documentation, attachments turn searchable through OCR, and AI coding agents extend the system because the architecture conventions are written down for them. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Between the spreadsheet and enterprise software sits Inventoros, a self-hosted system for tracking stock, orders, and suppliers across warehouses. A replenishment panel on the dashboard flags products below their minimum, and purchase orders go to suppliers by email and are received into stock. Products carry SKUs, variants, kits, batches with expiry dates, and serial numbers, with barcodes and QR labels for products and locations. Warehouses nest aisles, shelves, and bins, stock moves between them, and staff can be limited to the sites they work in. Orders handle approvals, payments, refunds, PDF invoices, partial shipments, and returns, and a customer portal shows invited contacts their orders, shipments, and balances. Twelve built-in reports cover valuation, turnover, dead stock, profit margin, and ABC analysis, and a custom report builder exports to CSV, Excel, or PDF on a schedule. Webhooks, a REST API, GraphQL, signed plugins, and an MCP server connect it to the rest of your stack and to AI clients acting with a user's token. 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.

Checkout counter, stockroom, and bookkeeping share one screen in Dikasir, a self-hosted cashier system. Search products by keyword or barcode. Hold and resume carts. Apply promo rules and take cash, bank transfer, Midtrans, Xendit, or pay-later notes. Offline mode queues sales until the connection returns, and thermal receipts print over WebUSB. Stock is tracked per warehouse with stock opname, branch transfers, batch and expiry dates, composite kits, and reorder suggestions. Purchase orders flow into goods receiving and supplier returns. Payables and receivables show aging and partial payments. Customer tiers, loyalty points, vouchers, segments, and campaigns drive repeat sales, and a WhatsApp gateway sends reminders and promotions automatically. Dashboards break sales and profit down by hour, day, and cashier. Invoices export as PDF or Excel. Role-based permissions, cashier shifts with cash closing, discount approvals, and an audit log with before and after snapshots keep staff accountable. 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.

NexoPOS is a point-of-sale platform that runs a whole shop from the browser, covering the till, the stockroom, the customer book, and the day-end numbers in one place. Cashiers ring up sales on a touch-friendly register screen, take cash or card payments, print receipts, and process refunds without leaving the same view. Every sale draws down inventory automatically, and procurement flows record what arrived, from which supplier, and at what cost. Low-stock warnings and a full stock history help owners reorder before shelves go empty. Products carry categories, units, and tax rules, and barcode plus scale barcode support keeps weighed goods moving at the checkout. Regulars earn rewards, join customer groups, and redeem coupons at the till. Managers open and close registers, assign roles and permissions to staff, and review an activity trail for every sensitive action. Reports break down sales, costs, and stock value per period, giving a small shop the numbers usually reserved for chain headquarters. Owners extend the core with installable modules for restaurants, multiple stores, rentals, and bookings, added from inside the dashboard instead of by editing code. The same installation serves a single boutique today and a growing chain tomorrow, since registers, stores, and staff all live in one database. 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.

Sell from one storefront or eleven at once: Maho runs your whole shop, from the product grid shoppers browse to the admin grids where you run the business. Customers filter arrivals by price, color, size, fit, and material, open a product page with gallery, stock status, and reviews, and check out in one step with social login and saved cards. In the admin you build customer segments from lifetime value and last-order rules, shape Google Shopping feeds element by element in the XML builder, review revocation requests in a searchable grid, and set up gift cards with fixed amounts and lifetimes from the product tab. Eleven storefront themes come with a live theme editor, a drag-and-drop page builder, an image editor, and content versions, while marketing tools cover email automation, dynamic categories, and a blog. Multi-store setups run many websites, stores, and currencies from one installation, and payments span PayPal, Braintree, Mollie, Klarna, and more first-party modules. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. OSL-3.0 licensed.

Salesforce's core workflow, open-source and on your own server: Twenty is a modern CRM built as exactly that alternative. It ships the standard CRM objects out of the box: people, companies, opportunities, notes, and tasks, displayed in table and kanban views with drag-and-drop and real-time updates. Its defining technical feature is a metadata-driven data model: you define custom objects and fields in the UI, and the backend regenerates its GraphQL schema at runtime, so a new object gets working queries, mutations, filters, and sorting within seconds, with no migrations to run - adapting the CRM to your sales process never requires code changes. A REST API is auto-generated from the same schema, GraphQL subscriptions push real-time updates, and webhooks fire on record changes for external integration. A visual workflow builder automates actions like notifications and field updates, TypeScript-based apps extend the platform with custom logic and frontend components, and email and calendar sync pulls Gmail messages and meetings onto contact timelines so communication history sits next to the record. The stack is NestJS with TypeORM, PostgreSQL, Redis, and BullMQ on the backend, React with Jotai on the frontend. Self-hosting on RepoCloud means unlimited users with no per-seat licensing - the pricing model that penalizes growing teams on commercial CRMs - and your pipeline, contacts, and deal history live in your own PostgreSQL database rather than a vendor's.

Teams tired of paying Salesforce or HubSpot per seat run EspoCRM: an AGPL-licensed PHP application with a fast single-page frontend over a REST API, covering sales, support, and marketing in one uncluttered interface. The sales core is complete - leads, contacts, accounts, opportunities with customizable pipeline stages, kanban views, calendars, meetings, and calls. Email is deeply integrated rather than bolted on: IMAP sync links messages to CRM records automatically, and mass email campaigns run with reusable templates, tracking, and Web-to-Lead forms feeding the funnel. Support teams get case management and a customer portal where clients track their own tickets and access a knowledge base. The real differentiator is the Entity Manager: create custom entities, fields, relationships, and layouts from the admin UI without code, with dynamic logic showing or hiding fields conditionally - EspoCRM is as much a business-application platform as a CRM. Formula scripting handles calculated fields and record automation in the free core; the optional Advanced Pack adds visual BPM process design and workflow rules. Role-based permissions with team and territory scoping, full-text search, reports, and a straightforward REST API for n8n or custom integrations round it out. Runs on PHP 8.3+ with MySQL, MariaDB, or PostgreSQL - unlimited users, zero per-seat fees.

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.