Viber (text & cell calling via data. Think Skype but easier to use)
HeyTell (treat the iPhone like an RT)
Songify (make yourself sing like a complete loser, but it's a real giggle)
MythRemote & RRgh (turns iPhone into MythTV remote controls over wifi)
yxplayer2 lite (stream recordings from MythTV backend to the iPhone)
Other related posts:
Extending the CEPH cluster, things we've learnt
Creating redundant, clustered & scalable storage - a DIY guide
Building A Win8.1 based Chromebook - A How To
Comment by muppet, on 8-Aug-2011 07:40
Might help to explain what RT means. I looked up the app and I can see it's a Push To Talk app, but I though the usual shorthand for that was PTT?
Comment by billgates, on 8-Aug-2011 08:50
Try 'Photosynth' as well.
Comment by Andrew, on 8-Aug-2011 16:00
RT would be "Radio Transmitter", otherwise known as a walkie-talkie.
Comment by UncleArk, on 8-Aug-2011 16:11
RT as in Radio Telephone http://en.wikipedia.org/wiki/Radio_telephone