This is a great source for all of your song file needs. Once you are registered with Bemanistyle you have access to hundreds of thousands of sim files for your DDR addictions.

When in their Sim File database be sure to limit your search to 'DWI' and 'SM' formats for PSPR.

The inspiration for PSPR, Stepmania is the free version of DDR for the PC. Here you can find a great selection of 'SM' files from Stepmania as well as from users.

Creators of the 'SM' format, Stepmania paved the way for free DDR.

User Songs

Wipeout is an amazing step file creator whos songs I personally enjoy.

Check out wipeout's most recent collection of step files on his website.