don't promise they will work for you, but give em a go!.
middlemarch 1.01
This is something I used a little while ago for a show Bryan Teoh and I played. I cleaned it up a bit and bundled a ReadMe with instructions. You'll need the Max/MSP 4.5 runtime to run it or a full version of max to hack it up. Here's a really unmusical demo of the stuff it does using the bundled drum sounds (you can swap out your own) and recording my casio into one of the samplers. Enjoy!
Changelog: 1.01 - I found out that I forgotten to include an abstraction that already existed in the core max distro, so I swapped in transRatio for midi2speed, doh! thanks joerex :)
icy 1.0
this os x vst/au plugin is modeled after grmtools freeze. you'll need the pluggo runtime to use this plugin - it's free, and you can download it from www.cycling74.com