Habitica - Interesting concept! A free habit-building and productivity app that treats your real life like a game. With in-game rewards and punishments to motivate you and a strong social network to inspire you.
Navigator - Brings collaborative agendas, files, notes, and action items to every meeting on your calendar.
Stacks - Mac, Windows, or Linux Trello alternative. A kanban-based task manager that helps to organize your tasks in an elegant and intuitive way.
TikTick - Time tracking made simple. A free app to manage multiple clients, add folders, projects, and take control.
MergeURL - Here's a new type of link shortener. This one allows you to shorten up to five links using a single URL.