All Open Source Apps

Open-source online accounting for small businesses and freelancers — invoices, expenses, and reporting without monthly fees or vendor lock-in.

The world's largest open source marketing automation platform — own your data, run multi-channel campaigns, and escape vendor lock-in forever.

Open-source CRM platform with metadata-driven customization, field-level permissions, and a full REST API — deploy on your own infrastructure.

Self-hostable invoicing, time-tracking, and multi-gateway payment platform for freelancers and small businesses, with built-in e-invoicing compliance for EU and global standards.

A developer-first PHP CMS with clean-slate content modeling, auto-generated GraphQL API, and a four-tier edition system that scales from solo projects to enterprise deployments.

Open-source column-oriented database that delivers real-time analytical queries on petabyte-scale data with millisecond latency.

Open-source, privacy-first web and app analytics that puts you in complete control of your data.

Your own private cloud: self-hosted file sync, collaboration, and communication with no vendor lock-in.

Professional open-source time tracking with invoicing, multi-user support, SAML/LDAP auth, and a full REST API—self-host it or use the cloud.

Run your own help desk and shared inbox — a fully self-hosted, open-source alternative to Zendesk and Help Scout with no per-agent fees.

Free, MIT-licensed 2D and 3D game engine with one-click multi-platform export and no royalties.

Self-hosted read-it-later app that saves clean, ad-free articles from any webpage for distraction-free reading across all your devices.

Open-source Laravel eCommerce platform for building multi-vendor marketplaces, B2B stores, headless commerce, and AI-powered storefronts.

Open-source self-hosted PaaS — deploy apps, databases and 280+ services on your own servers with no vendor lock-in

Free, source-available game engine for 2D and 3D games on desktop, mobile, web, and consoles — no royalties, no licensing fees, full source access.

Open-source C++ 3D engine with DirectX 12, Vulkan, and Metal — featuring real-time ray tracing, PBR, ECS, Lua scripting, and cross-platform support for games and graphics applications.

Free, open-source Laravel & Vue.js CRM for SMEs and enterprises to manage the complete customer lifecycle.

An open-source, C++ search database positioned as a faster, lighter alternative to Elasticsearch — supporting full-text, SQL, JSON, and vector/embedding search over a MySQL-compatible protocol.

Self-hosted, end-to-end encrypted password manager API built for teams who demand full ownership of their credentials.

A decentralized, self-hosted photo sharing platform built on ActivityPub for the open Fediverse.

A modern Redis and Memcached replacement engineered for multi-core servers — delivering 25x more throughput, better cache hit rates, and up to 80% lower memory consumption with full API compatibility.

Project management built for ADHD, autism, and dyslexia — simple as Trello, powerful as Jira

High-performance in-memory graph database for AI context and real-time analytics

Open-source, cross-platform 2D/3D game engine with Vulkan, Metal, and WebGL support for web, mobile, and instant gaming platforms