If you have an ipad or android tablet, have a look at Touch Portal.
It allows you to have multiple programed button, number-pads, multifunctionkeys etc.
For example I have one key that will explode a group, run fixit 101 and then regroup it. This is a handy process after doing a 360 bend with truebend, it removes the problematic double face that is produced by the plugin.
I only mention that as it is one that springs to mind, basically it allows you to set up all sorts of shortcuts and scripts.
In this thread you can see it as part of my setup from a while back, it has changed since then.
The whole thread will probably interest you.