1. Livescore — Get real-time score updates http://android.livescore.com/
2. Sky Sports — Get the latest news, views and video http://www1.skysports.com/mobile/apps/7378885
3. TalkSport — Get exclusive interviews, breaking news and the latest debate. http://talksport.com/

Bonus:

Twitter is an amazing platform to follow the World Cup on. There are hashtags for specific games and more general ones for banter and debate.

Follow me on Twitter @PatrickShayes