New "favorites" at least once a week... this weeks are:
PowerTutor - Android app on AppBrain
You can actually watch how opening and closing an app effects power (drain). Turn on airplane mode and watch it drop! Shows you mW of power for EACH app, or all together. Best battery monitor I've tried! It drains the battery itself, so only use it for short tests, or some fixed time (ie: don't forget to turn it off).
My other fav this week is:
Google Tasks Organizer Lite for Android | AppBrain.com Great app if you like using Google Tasks. Lots of type size options, syncs well, more organized that Google Tasks.