I've started making BMS files of my own compositions, playable with a variety of simulators, such as MixWaver, bemaniaDX, or Rhythm-It.
Archetype - 17MB. 5key (7☆), Light 7 (4☆), 7key (7☆), Another 7 (8☆)
Theme to 忍者シェフあやか (BM Version) - 5MB. 5key (7☆), Light 7 (4☆), 7key (6☆), Another 7 (7☆)
Since I'm a big fan of Dance Dance Revolution, I've made some step charts for a few songs. You can download them and play them on your computer. They're in SMZIP form, since they should really be played with StepMania.
Casper - Cha Cha Slide (steps by Lily, my sister)
Crystal Waters feat. DJ Escape - Come On Down (AtW Edit) (steps by Lily, Challenge by me)
Vib Ribbon - Laugh and Beats (Tournamix 4 Entry)
Junior Senior - Move Your Feet (Challenge only)
Factor-X - Wild Rush (From Nonstop Megamix) (Challenge steps)