Wren - Offset your carbon footprint by saving rainforests
ChatWhale - Gamify your customer communication and loyalty rewards
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.
Open Loyalty for Startups - Open source stack for building customer focused products
Treepoints - Fight climate change and earn rewards
Reviews for iOS - Keep track of your App Store reviews