Some good ones i use all the time:
Mytracks – GPS based tracking App, shows time, distance, elevation, average speed, highest speed, etc etc
BBC iPlayer – self explanatory really.
Eurosport – excellent sports news App, covers some of the more obscure ports that main sites miss out on.
Chrome – obvious choice if its your desktop too.
Amazon – self explanatory.
Kindle – truly great, why buy a kindle when you can turn your phone into one.
Ebay – A more user friendly App than the main site weirdly.
Facebook.
Twitter.
RAC traffic – congestion information.
SoundHound – Like the track on the radio but dont know what it is?….open soundhound and in a few seconds it usually identifies the track for you.
Unit Converter – very handy.
Yell – Yellow Pages App, often quicker than googling.
Urban Dictionary – expand your vocabulary, but not in a good way!
Google Translate – Fantastic App, often comes installed on an Android but if not just download it, its free anyway. Type what you want to say, select the language and if its a common language the phone will speak what you just typed to johnny foreigner…if the language is obscure it will give a text translation for the other person to read, they can then type back to you in their language and it will translate to english….brilliant, used it so much in work when there is a language barrier.
Google Maps, Streetview, Earth, Gmail, Youtube should all come installed as they are google products but if not they are all free to download.
BBC News – can have the App set up to delve into as a full site or as a live widget on screen constantly scrolling and updating today’s headlines.
Exchange Rates – live exchange rates App.
Winamp – Music App that can sync from iTunes
Easy MP3 Downloader – never pay for music again.
There are loads of games i wont go into as they are very much a personal thing…Android is lacking some Apps that iPhone has though, i’d like 4oD on Android but it not here yet and neither is the Eurosport live TV App either.