Blindfolded Solving

From Speedsolving.com Wiki

Blindfolded solving (abbreviated BLD) is the discipline of solving a puzzle without visual reference while manipulating it.

Official Blindfolded Events

The WCA currently recognizes four official blindfolded events: 3x3x3, Multiple 3x3x3, 4x4x4, and 5x5x5.

Blindfold Guides

Macky's Guides on 3OP and M2, and other information.
Stefan Pochmann's blindsolving pages.
Erik Akkersdijk's blindsolving section.

More Resources

Leyan Lo's blindfolding site
Rowe's freestyle corners video