Wren - Offset your carbon footprint by saving rainforests
iRewardHealth - Motivating healthy behavior change
Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.
Tep - Fitness tracker meets tamagotchi. Don't starve it!
Treepoints - Fight climate change and earn rewards
Physio Health - Stay healthy, get rewards.