HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.

Better Notes - Simple notes app that ties notes together with #hashtags

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.

Paper - Super-clean writing space with a lot of configurability that stays out of sight when you don’t need it.

Crucial Human - Crucial Human makes software focusing on human productivity, collaboration, and learning.

Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.