Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
GetBadges - GetBadges is a gamification platform which allows developers to play and compete while using software development tools.
tinyTimeSheet - A basic time sheet for Mac.
Goals & Challenges by Fini - A social way to gamify goals and habits with challenges
TimeLog App - The most dead simple and responsive time-tracking platform
HabitScript - Gamify your coding time