What is the best hot key application to launch AppleScipts?
If you only want to launch AppleScripts, the best hot key app is probably the cheapest one.
You can do a search on versiontracker.com using keywords “applescript” and “key”, “macro” and “key”, and “hot” and “key”. That will turn up a bunch of them.
I use QuicKeys and Keyboard Maestro.