Strong.app - Strenght training logger.
Fullcourt - The social network for basketball players
wger - FLOSS workout, fitness and weight manager/tracker written with Django
Sportal - Plan and play sports events
Burn.Fit - Burn.Fit is #1 Fitness log journal app that helps fitness lovers to track their workout to maximize results. Start track your fitness and home workout routines with Bunn.Fit
Sporty - Beautiful app for creating/joining sports activities nearby