Every Time Zone - Online tool for keeping up with times around the world.
Wren - Offset your carbon footprint by saving rainforests
Time.is - exact time in any location
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.
World Time Buddy - Effortless time conversion and world time.
Treepoints - Fight climate change and earn rewards