Best Free Open-Source Collaboration Software

Open-source, self-hosted alternative to Trello, Asana, and Notion

A painless self‑hosted Git service for teams

Open-source Airtable alternative for collaborative databases

A collaborative, markdown‑based knowledge base for growing teams

Open source project management that works for you, not against you

Open-source collaborative wiki and documentation software

Documenting architectural decisions for better software development

Free and open source project management software

All-in-one workspace for notes and knowledge management

Secure, Simple and Scalable Video Conferences

All-in-one open-source whiteboard tool

Open-source project management for small teams and freelancers

Create project documentation with Markdown