Chronos - Automatically change almost any setting on your phone depending on location, time of day, dock...
Tasker - Tasker is an application for Android which performs Tasks (sets of Actions) based on Contexts...
Locale - Locale helps content owners and translators work together, so Rails developers are free to write more code
AutomateIt - Automate Your Android!
Llama - Phone going off at night? Annoying your colleagues at work? Get Llama!
Profile Scheduler - Profile Scheduler lets you change volume, wireless and other phone settings quickly and easily.