Baidu Hi Experience (Invitations being distributed)

The interface is clean, supporting personalized settings for personal status, file transfer, video and voice chat, group conversations. It's said that the audio quality is decent. There's also a group function, and of course, Baidu's signature search and space are integrated together. The installation file is less than 6MB, which is quite compact relative to these functions!

The upper limit of Hi friends is 1000, which should be sufficient for most people~