Soccer Scores Pro - FotMob This app costs US$2.49 and is a great app with soccer scores (live scores and match stats, tables, fixtures, news, top scores, and more!). It has coverage of almost every league out there. Very detailed. UI a little clunky.
Soccer This is a very simple soccer game. If you can't get out there and play - this is the next best thing!
World Cup Soccer Feed This is the app to have during the World Cup. It's free - and gives you the latest news, score data, and schedule for the World Cup.
Football Quiz This app will test your soccer knowledge. Great range of questions, but it isn't formatted correctly for my phone - doesn't fit on the screen.
Soccer Facts This US$0.99 app has facts about soccer and FIFA. It has FIFA history, structure, awards, criticism, tournaments, and sponsors as well as information about the game of soccer. All info available offline.