Songsterr - Learn songs while you play along

Songsterr is a nifty web app I stumbled across randomly. Basically, it's a web (flash) based tab reader that works quite well and has a large selection of music split into genre as well as difficulty categories.

You can pick the various instruments to display and it plays the parts along with you, allowing you to adjust the volume of each instrument so you can isolate various parts. It also has a tuner option built right in, so those strangely tuned songs you might want to play won't take as long to switch to.

If you pay for the app, extra functions like full screen, eq, etc become available. I highly recommend buying the upgraded status if you find it handy, it definitely adds nice features and will hopefully support new ones in the future from the developers. Even if you don't pay for it, go check it out I'm quite happy with it and have recommended it to numerous people who also enjoyed it.