Redesign Whatsapp. It's the most used application but the design is just ugly, simple... we need a new version! Don't forget to see the attachments :)
---------------------- Icons : http://www.iconarchive.com/show/ios7-icons-by-visualpharm.html / Iphone mockup : http://elgena.co and http://dribbble.com/shots/1038492-Minimal-iPhone5-Template-PSD