ID's DMs - Huge compilation level of dm1 through dm6 (contains sources and gnu.txt)

ID's DMs - Huge compilation level of dm1 through dm6 with teleports (contains sources and gnu.txt)

Zop-DM3 - DM3, but 1.5x the size (you thought the mound rj was hard before...)

Zop-DM6 - DM6, but tilted (this will mess with your head!)

Fuzznut's - Large level with catwalks and interconnected rooms (recommended)

Frenzy - Little level with moving platforms

Boxes - Basic level, 1 room with upper and lower area