Rocket.Chat - Free, Open Source, Enterprise Team Chat
GitHub - greggigon/my-personal-kanban: This is a one page HTML/JavaScript application for people who would like to use simple and basic Kanban board for their personal stuff
Jami
Home - Pencil Project
Ferdi
kofigumbs/multi: Create a custom, lightweight macOS app from a group of websites
Focalboard: Open source alternative to Trello, Asana, and Notion
Spectre: Passwords, Privacy-first