I don't know why this little program isn't more known. Since I downloaded it for the first time it's been with me on every single work and home pc I've ever laid my hands on.
It's basically a clipboard caching utility. It stores everything copy (you can set how many things it keeps in the cache) and by pressing Alt+C it brings a list of that things.
How many times have you found yourself wanting to copy&paste several things at the same time? Or accessing something you have on the clipboard a few minutes ago but now replaced by other thing? Well, CLCL will help you with that.
I used to use clcl: http://www.nakka.com/soft/clcl/index_eng.html
Dunno how I found it, but it was perfect. I'm on Mac now and haven't found one I'm super happy with. They all try to do more than I want them to do, or are absolutely basic. I want it to remember 20 or so recent items, along with saved presets (for things I don't want to memorize - CSS/HTML, hex codes, canned responses, etc).