WhatsApp style instant messenger client
Talk with everyone at once
Free video calling and messaging app for BlackBerry
Free software to remotely manage smartphones
Communicate with the world, BlackBerry style
Social & Communication for BlackBerry
Call and text free over 3G and Wifi
The alternative to WhatsApp and Line: free messages, personal wall and VoIP, all from Samsung
Chat with Telegram on BlackBerry (with an unofficial app)
Another messaging service? Yahoo?
A free program for Blackberry, by OpenWhatsapp.
Talk to your Facebook friends