Google Voice 0.4.2.8
Forwards calls from up to six phones and transcribes voicemail to text!
the author of this app says:
Place calls and send text messages showing your Google number. Listen to voicemail and read transcripts. Currently only available in the US.
NEW: Search your voicemail transcripts and text messages.
IMPORTANT: You must open Google Voice at least once after upgrading to route calls.