Popular free IM client for Android
Trillian is a chat client for the more conversational Android user.
It promises to save users money on their chats, by replacing SMS costs, and unite mails, messages, and other communications in one place.
Push C2DM notifications and syncing with Mac, Windows and webmail bring email into the fold, and the app suitably includes picture messaging. Trillian’s developer said that it has a focus on speed and a low memory footprint, which means that the application should run without impacting on handset performance.