Is there any free screencasting software? I am searching for an OK and free screencasting app to finally start LP-ing.
The app doesn't have to record sound because I can do that sort of stuff with Audacity. Recently  tried out "Copernicus", a screencasting app; I set the frame rate to 30, hoping for a good result, but it didn't turn out that well. In fact, it was horrible, the 8 second video I captured using this software turned out to have 2 frames per second.

If you happen to know of any good, free software for screencasting, please post some links.
I don't do a lot of LPs, but the last time I did I used QuickTime Player.app (Quicktime Player X); you'll find it in /Applications. To record your screen, select File > New Screen Recording.

The results were pretty good; recording Minecraft 1.7.3 gameplay on an about a year and a half old MBP, but I have a lot of RAM, so that certainly helps.

Edit:

It's worth noting that QuickTime Player X does not support loopback sound; meaning that the only sound recorded will be from the microphone, or virtual sound device providing loopback sound.

This may or may not be a good thing, depending on what you are doing.