WeChat is already out for Android and iOS and now Blackberry. Chat with your friends among all the different platforms. My favorite is the variety of emotions and also the layout looks clean and unfussy.
WeChat is the complete mobile communication and social networking app.
Free, cross-platform, and full-featured, WeChat is the best way to keep in touch with everyone you care about.
-Fun one-on-one and group chats with voice messages, texts, pictures
-Chat with friends across platforms
-Enhance your chats with a huge selection of animated emoticons
-Power-saving optimizations and low data consumption rates
-Simple Facebook Connect log-in
-Fast and easy registration via phone number (supports more than a hundred different regions)
-Supports 5 languages, including English, Thai, Indonesian, Traditional Chinese and Simplified Chinese
Get it for free Blackberry App World.
You can also learn more about it at the WeChat website.