Social networking was not my forte just two months ago, I was not much into it. Just a bit of Twittering here & there and small visits to Facebook, that was all. 2009 changed the scene a lot, I went on being a regular on Twitter and Facebook. Among other things in Social Networking, Wakoopa and Last.fm helped me a lot to share alike.
Back to the days of hackintosh, when I was using Leopard in my PC, I liked an app called AppFresh. It used to fetch all the info about applications I worked with in Leopard and then synchronized them with osx.iusethis.com. The best thing with it was its capability to check if I was using latest version of softwares. Back on Vista and now Windows 7 beta, I thought if there were something with same functionality available in Windows, it would really help to track my applications. After getting through some complicated apps and wasting time on them, I found Wakoopa.com. The concept of Wakoopa is moreover same with that of iusethis.com but Wakoopa interface really rocks, quite Web2.0-esque and fluid. They also have a tracker software to download from their site which automatically starts up while user boots into Windows and track user's application usage and website visit histories while running in the background. One can also add some friends and grow networking in Wakoopa which also enables to check what they are using.
None needs a introduction to Last.fm, I just discovered (lame I know, I came so late) its amazing capabilities and connectivity options. A real lot of people is using the service already, so it's likely that you will find your friends are there already; well, I already found the same. Last.fm really shows how music listening experience sharing can be splendid. Add their online radio support in that, we get a winner here.