aseqjoy is a Joystick to ALSA MIDI Sequencer Converter. In fact it's a really tiny piece of software that turns a joystick into a MIDI controller for the ALSA sequencer infrastructure. I mainly wrote it to test the new MIDI interface of terminatorX but then I thought it might be useful with other scenarios and applications, too.
For a more detailed description on what it does and how to use it have a look the manpage.
If you want to test it yourself download the source: aseqjoy-0.0.1.tar.gz (Sorry no binaries - but it's so small it only takes seconds to compile it yourself :) Compiling aseqjoy requires kernel and ALSA (asound library) headers to be installed.
To compile and install it's really just the simple:
tar xzf aseqjoy-0.0.1.tar.gz && cd aseqjoy-0.0.1 && ./configure && make && make install
To make full use of aseqjoy you might require jscal from the Vojtech Pavlik's joystick package (to calibrate your joystick) and Robert Ham's alsa-patch-bay or aconnect from the alsa-utils package to connect aseqjoy's MIDI output port to other input ports.
aseqjoy is distributed under the terms of the GNU General Public License V2.