HotKeyNet is free, so you can give that one a try.

I actually went with KeyClone initially based on what users here said about it. I used it under XP and quickly learned that boxing was for me. When the Windows 7 beta was opened up I downloaded that to give it a try. I didn't want to transfer my license (in case I didn't like Win7 and went right back to XP), so I switched to HKN. I found that I liked HKN better, but don't regret paying for KeyClone at all. That $20 helped show me how great boxing can be, and should I ever want to give it (KeyClone) another whirl, I'm free to do so.