Nimbuzz: Chat & VoIP for PC, Cellphones and iPhone

Nimbuzz is a instant messaging software developed for PC and cellphones, including iPhone, that allow to communicate with the contacts of: Skype, MSN, Yahoo, ICQ, AIM and Google Talk.
Besides, it's possible to use the VoIP account to make normal phone calls to landlines phones and cellphones.
For more informations and features, refer to the Nimbuzz official website.
The iPhone version of Nimbuzz is available on the App Store.