Orcaso - Work is now gamified. Achieve greatness through orcaso.io, the simplest project management/team collaboration tool.
Purp - A smart to-do list and goal tracker app
GetBadges - GetBadges is a gamification platform which allows developers to play and compete while using software development tools.
Things - Things is an easy to use task manager.
Habitica - Habitica is a free habit building and productivity application.
Nirow - Habit tracking: Automated, Siri-ed, Calendar-ed, and More!