TuneIn Radio Pro: very good online radio player
Wunderlist: to do list
Tripit: traveler helper
Trapster: drive safely by knowing in advance where are the traps and accidents or road works ahead.
Swiftkey X: awesome keyboard which learns your words from your sms and emails and predict the next words not based on alphabetical possibilities but based on what you usually write.
Airdroid: configuration interface that let’s you control your android from a computer with a web interface. It is especially useful for sending texts from your computer through your phone.
Winamp: music player
Astro: file manager
Droidopas: reittiopas on android, I wish there would be a better one.
K-9 Mail: very good email reader, much better and faster that the default one.
Pulse: news aggregator
Calltrack: let’s you insert call logs into a google calendar