Timelines - Timelines is an app to track & visualize time.
Timeglass - Multi-step & spoken timers for your workouts & cooking.
Workout Timer - A simple, customizable workout timer
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
WorkoutSesh - Free workout routines with interval timer
Timing - Timing is the best way to keep track of the time you spend with your Mac.