Lunyr - A decentralized crowdsourced encyclopedia.
Azendoo - Azendoo is a collaborative task management solution that helps companies to get work done easily and in teams.
Tealfeed - A knowledge sharing platform to empower creators
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Diem - Diem is a knowledge-sharing platform and digital safe space built for women and non-binary people.
Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.