collaboration

AppFlowy is an open-source alternative to Notion that allows you to build detailed lists of to-dos for different projects while tracking the status of each one. It provides a comprehensive workspace for notes, tasks, databases, and collaboration with a focus on privacy and customization.

Stirling PDF is a powerful open-source web-based PDF manipulation tool that enables secure local hosting and provides 50+ operations including splitting, merging, converting, and more.

Gitea is a painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD. Built with Go, it provides a lightweight yet feature-rich alternative to GitHub with easy installation and low resource requirements.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It provides team messaging, file sharing, project management and integrations in a self-hosted environment.

Outline is a fast, collaborative knowledge base for growing teams that's beautiful, real-time collaborative, feature-packed, and markdown compatible. Built using React and Node.js, it offers a modern approach to team documentation.

Nextcloud is a comprehensive file hosting and collaboration platform that allows you to access and share your files, calendars, contacts, mail and more from any device, on your terms. It provides a secure, private cloud solution with extensive app ecosystem.

Wiki.js is a modern, lightweight wiki platform built with Node.js that offers powerful editing, beautiful themes, and Git-based storage for collaborative knowledge management.

Focalboard is an open-source project management tool that helps define, organize, track and manage work across individuals and teams. It serves as an alternative to Trello, Notion, and Asana, providing kanban boards, table views, and calendar functionality in a unified platform.

Wekan is an open-source Trello-like kanban board that provides teams with a powerful, self-hosted project management solution. Built with Meteor and Node.js, it offers comprehensive kanban functionality with real-time collaboration, extensive customization options, and enterprise-grade features.

Docmost is an open-source collaborative wiki and documentation software that provides real-time collaboration, diagrams support, and enterprise features as an alternative to Confluence and Notion.

Gollum is a simple Git-based wiki system that allows for human-editable text/markup files, flexible organization, and support for multiple markup languages.

Seafile is a file hosting and sharing solution primarily designed for teams and organizations. It provides reliable file synchronization, sharing, and collaboration features with strong security and performance optimizations for enterprise use.