XKeys
Actually, it looks like the app is "XKeys" -- small but important difference. Personally, I've started using (and really like) YoupiKey. It seems like its really power comes if you're willing to tinker with AppleScripts. And you can assign almost any key combo (for example I've made iTunes scripts for F13, cmd-F13, and cmd-opt-F13). I won't critique XKeys as I haven't used it, but from a read through the online manual, it seems pretty limited. But, it may be quite adequate for some.