Better Notes - Simple notes app that ties notes together with #hashtags
HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
Whimsical - The visual workspace for teams.
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.
Great F*cking Startup Advice - Strongly worded suggestions for startup founders
Crucial Human - Crucial Human makes software focusing on human productivity, collaboration, and learning.