Moving away from Google

Moving my contacts and calendar away from Google:
http://davdroid.bitfire.at/what-is-davdroid
http://baikal-server.com

Collaborative editing: http://etherpad.org/

Voip:

jitsi.org They have a new alpha for android, might be a suitable option on android as well in the future

or Mumble http://mumble.sourceforge.net/ but it requires a server and people connected to that server.