HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
GitHub Team Discussions - Now there's more space to talk through your projects 💬
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.
LARDER - Bookmarking for developers
Crucial Human - Crucial Human makes software focusing on human productivity, collaboration, and learning.
gUmi - Manage infinite Git profiles in one click