We have just launched a crowdfunding campaign to develop a new frontend to Libervia, and port it to Android (in a native application!).
http://www.arizuka.com/en/projects/libervia (subtitles available in many languages).
If the campaign is successful, we'll have a unique tool. Here are only a few features managed by Libervia:
In addition we are a non-profit association focusing on ethic, we want to make a good tool, not a place for advertisements!
So if you are looking for next-gen communication tool, please support us and share the link: http://www.arizuka.com/en/projects/libervia