I've just installed fring on my mobile, it's some VOIP/chat thing that allows me to use google talk, gmail, msn and skype on my phone.
I used to have the skype app, which also allowed voip calls, but it didn't allow incoming calls from my SkypeIn number. Fring does, so I can now take business cals on me mobile via a landline number. It also uses a different ringtone so I can tell I'm being phoned through fring.
I also used to have windows live messenger for mobile, which was alright, except it drained the battery in about 2 hours, and could only connect via the 3g network and not wireless. Fring manages to work without sucking the life out of my battery, plus it roams from 3g to wireless whenever it becomes available. It also allows VOIP to msn users too.
It is rather good I think. Though it comes with some hideous ringtones.
