Android applications I can’t live without
TouchDown – This Microsoft Exchange client is my primary email program. Without this piece of software, I would have purchased another Windows Mobile phone. I don’t have anything against Windows phones, they’re just lagging behind in the phone wars right now. I may switch back in a few years. But so far I am loving my Android Dev Phone 1.
Locale – This program lets you change your phone settings based on situations. You can create situations based on criteria such as location, battery status, date, time, and who is calling you. Right now the only rule I have is to turn the ringer on whenever I’m within a few blocks of home. It makes sure I won’t miss any of those middle of the night wake up calls when a server is down. I plan to add more rules, but this single one has reduced one of the biggest worries of my job…missing a call when I’m needed.
There are also plugins for Locale that allow you to send SMS or tweets based on situation changes. I’m already annoying my girlfriend with SMS messages that automatically go out when I get home 
This is one of those programs that you can’t believe you lived without once you start using it.
ConnectBot – I have to have an SSH client on my phone. With this one I can even do pretty well in emacs
There are a few other applications that I like, like AK Notepad, Yellowbook and The Weather Channel, but I can live without those.