Habitica - Habitica is a free habit building and productivity application.

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.

Rithm - Chat with music

Woohoo - Increase conversions by replacing popups with mini games

Bookling - Track your reading habits and set goals

Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.