WhatsApp Messenger
100,000,000 - 500,000,000 downloads
Pros
- Cross-platform nature (Android, iOS, RIM, Symbian)
- Push notifications
- Share multimedia files
- Group chat
- Automatic contact integration
Cons
- Price after trial
- Needs Android 2.0 and later
- No integration with other messenger apps
WhatsApp Bluetooth
Pinch
Pinch Pro
Nimbuzz Messenger
WHATSAPP launcher by rotating!
Talker
WhatsApp Wallpaper