Another vote for accuweather. Taptap revenge is a great game for free. I tend to download all the top 50 free apps and delete them if they are no good.
Sky sports and eurosports apps look like they could be interesting for this season. Otherwise shazam as a gimmic is quite good, and radiobox seems to work well for digital radio as long as you're in a 3g area. Good for the cricket anyway
Ghost Capture - Puts a ghost in a picture and scares the f*ck out of the girls in the office
TuneIn Radio - the main version is a couple of quid but there is a 'lite' version. No more wondering what the score is when I'm at the mother in law's two hundred miles away. I can listen to BBC Sussex when I want
Darts - you can er . . . . play darts
iMorseCode - for when you need to resort to a primitive form of texting/emailing
Locly - think it's free but it tells you where all sorts of stuff is. Locally. [Geddit?]