Midi Files
I haven't only made music for LotRO, I also turned some of those abc files into midi's, which are listed here. To download a midi file, right click on it, and select Save Target As... from the dropdown menu.
Note: I only turned the .abc files that I made personally into midi's.
A song from the Blues Brothers
Californication, by the Red Hot Chili Peppers
Crazy Train, by Ozzy Osbourne
Dr. Mario, by Nintendo
Ancient Dragon's Fort, by Yasunori Mitsuda
Grab Bag, by Lee Jackson (Duke Nukem Theme)
Halo Theme, by Microsoft (I don't know who in specific)
Lizard Dance, by Yasunori Mitsuda (all in piano)
Mario Bros Battle, by Nintendo
Mario Bros 3, by Nintendo
Namida, from Rurouni Kenshin (Closing Theme #2)
Smells Like Teen Spirit, by Nirvana
Scars of Time, by Yasunori Mitsuda
Stairway to Heaven, Led Zeppelin
The Superman Theme, by John Williams
Another Termina, by Yasunori Mitsuda
Unknown1, by me, Daaku (very long and boring)
Unknown2, by me, Daaku
Voyage - Another World, by Yasunori Mitsuda (all piano)
Super Mario World Yoshi's Island 2 stage
Zelda Theme, by Koji Kondo (I think)