Gradywerks MPG64-A and MPG64-R

"The MPG64-A (Midi Pattern Generator 64 Alpha) is a 64 step midi sequencer designed to run on Windows Vista or XP with a minimum screen resolution of 1024x768. In addition to playing midi notes, the MPG64-A is capable of simultaneously recording the resulting audio, creating loopable WAV files that can be used in any audio application. An 'Auto Set' feature can be used to automatically calculate and correct for latency of the midi device prior to recording, resulting in loopable samples.
The 64 step pattern data can also be exported to a midi file. The MPG64-A features a row of parameter knobs which can control the duration and velocity of each note, and can also be used to set values for two continuous controllers. A 'Controller Automation' feature uses preset patterns to modulate the continuous controllers to create filter sweeps and random 'sample and hold' type effects. The MPG64-A is also designed to run as a plug-in for Tu2 by Bram Bos. When using the MPG64-A to trigger a software synthesizer running on the same computer, you may need to install a 'midi loopback' such as Maple (Windows Vista) or MIDIYOKE (Windows XP)."

" There are now two versions of the MPG64-R. A free version, and a 'Special Edition' version available after a $19 USD donation. The Special Edition version features new graphics and a second tempo knob for the last grid two rows. By setting the 2nd tempo to a different value, some very unique and complex drum loops can be created.

The MPG64-R is the sister program of the MPG64-A and is geared for creating drum patterns. Some features include the ability to play in midi sync with the MPG64-A and the ability to export the pattern data to a Midi file. The primary feature of this program is a very simple, 64-step drum grid which can be used in lieu of your existing drum machine's complex sequencer. It can be used to trigger any type of midi drum machine, either software or hardware. Each of the 20 rows can be set to a different midi channel, so you can even trigger multiple devices simultaneously from the same grid! You can also run multiple MPG64-R's in synchronization, just in case 20 drum sounds triggered simultaneously isn't enough :)"
gradywerks.com - you'll find videos and more.

via papydasy:
"With the random button you get very interesting sequences. Slave it to midi clock I open say 5 Instances of the MPG64-A all controlling different synths, pressing the random button until something interesting happens. Can be 4 beats 8 ,16 ect. Interesting results all the time."