Mandarin IM app
Mandarin IM is Internet tool that is open source under the MIT license.Mandarin IM is a client to communicate on ICQ. Now you can be online 24 hours a day, Mandarin will run itself in the background to receive and deliver messages, not consuming the battery of your phone. You can type messages to friends, send photos, videos, even if now there is no network. Mandarin itself will deliver them as soon as possible.
Forget about disconnections from the network - Mandarin saves the state if the network down, and all your actions carefully preserved and will be executed when network became available.