I don't have a dedicated mining rig; I do all my mining on my main computer when I'm not using it for something else. So to help me do that, I wrote a screensaver that starts up my miner when I'm away and stops it when I come back. After mentioning it to some people, they said I should release it so others can use it. So I cleaned it up a bit and here it is.
It's actually more than just a mining screensaver: you can run any command line program (including batch files) with any set of arguments. This is my first real open source release, so it may not be professional quality, but it seems pretty stable and easy to use. If you run across any bugs or anything, let me know and I'll try to fix them, though I don't have too much free time at the moment. Or you can fix them yourself, since I included the source!
Here it is: http://dl.dropbox.com/u/29782458/CommandSaver.zip
If you like it, feel free to shoot some BTC my way: 18fr1BkoLNHt6znt1v5ByRod6Y9q3sWQ35