Wren - Offset your carbon footprint by saving rainforests

Clocks - A minimal world clock app for your Mac's menubar

Klima - Go carbon neutral

Clocker - Keep track of people in different time zones

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.

Spacetime - Work hour and time zone management for distributed teams.