Discover recent open source alternatives

Open source base-building and factory-automation puzzle game inspired by Factorio — extract, cut, rotate, and combine shapes on an infinite map.

Open source automation tower defense RTS — build factories, mine resources, and defend your core against waves of enemies.

Free, open source turn-based strategy game set in a high-fantasy world, with single-player campaigns and online multiplayer.

Open source game engine that reimplements early Westwood classics including Command & Conquer: Red Alert, Tiberian Dawn, and Dune 2000.

Self-hosted recipe, pantry, and cooking tracker with a PWA and native Android app — no telemetry, no cloud lock-in.

AI-native, local-first markdown editor and LLM wiki with built-in integrations for Claude, Codex, and other agents.

Privacy-respecting mobile book tracker for iOS and Android, built with Flutter — your library lives on your device.

Federated, self-hostable social network for readers — book shelves, reviews, and reading status, decentralized via ActivityPub.

The official CLI for the Marp Markdown presentation ecosystem — write slides in Markdown and convert to HTML, PDF, PPTX, or images.

Markdown-based presentation slides for developers, with code highlighting, Vue components, theming, and PDF/PPTX export.

Open source desktop Markdown presentation editor with live preview, themes, and PPTX export — a self-contained alternative to PowerPoint.

Self-hostable open source video review and asset collaboration platform, a privacy-friendly alternative to Frame.io.

Offline-first, self-hostable note-taking app with rich text, tags, attachments, and cross-device sync via Docker.

Open source wiki and documentation platform with a books/shelves/pages model — a simple, self-hostable alternative to Confluence and Notion.

Open source project management system for non-project managers, built with ADHD, autism, and dyslexia in mind — an Asana and Monday.com alternative.

Open source LLM engineering platform for tracing, evaluating, monitoring, and managing prompts as an alternative to LangSmith and Helicone.

Self-hostable session replay, cobrowsing, and product analytics platform that is a strong open source alternative to Hotjar and FullStory.

Self-hostable, Dockerized mail server bundle that combines Postfix, Dovecot, and a polished web UI — a Gmail and Microsoft 365 alternative for organisations.

End-to-end encrypted, open source notes app that is a privacy-focused alternative to Evernote, Notion, and Apple Notes.

Local-first, end-to-end encrypted alternative to Notion that lets you build a private knowledge base, docs, and tasks with no central server.

Privacy-first, open source knowledge management and note-taking platform that is a powerful Roam Research and Obsidian alternative.

Open source identity provider and SSO solution that replaces Auth0 and Okta with a self-hostable, flexible authentication platform.

The fastest growing-team knowledge base — beautiful, realtime collaborative, feature packed, and markdown compatible Notion and Confluence alternative.

Developer-first open source Typeform alternative (formerly Blocks.md) with Markdown-defined forms and native Google Sheets integration.