It’s not like the world needed another instant messaging service, but Viovo Windows Messenger and Viovo Mobile do have some cool free features to offer. Viovo Windows messenger allows you to make free PC to PC calls with other Vivovo users. They also have a Wviovo mobile application for Windows Mobile Pocket PC and Smartphone Editions that works over wi-fi, so that you can make free mobile to mobile, and pc to mobile calls as well. Thus, Viovo might make a good Skype alternative for people having problems running the power intensive Skype on their mobile device. We tried running it on the Treo 750V, for the chance that it would work on T-mobile’s Edge network, but unfortunately it really won’t run at all unless you have wi-fi. It’s also worthwhile to mention that Viovo also supports text chat and file transfer.