I really need to set up something to record myself playing a few progressions so I can practice licks and stuff over the top. It would be great if I could then record this to hear the good from the bad and the ugly!

So, rather than buying a 4 track is they're any sites where I can download some free software to do this through my PC's sound card? And while I'm here what about software to produce effects??

I'd appreciate any input.