Workspaces!

ControlPlane, a fork of MarcoPolo , brings context-sensitive awareness to OS X. With ControlPlane you can intelligently reconfigure your Mac or perform any number of actions based on input from a wide array of evidence sources including but not limited to available WiFi networks, connected monitors, connected and nearby bluetooth devices, currently running apps and other configurable sources.

Smartest way to work on your computer. Freeter is a productivity app that allows you to gather everything you need to work in one place and access them quickly and easily.