The OSRIC rules are available
free at
Drive Thru Games
OSRIC stands from Old School Reference and Index Compendium and is to 1e/2e rules what Pathfinder is to 3/3.5 rules. basically they have taken the original rules and re-packaged them so people could produce modules without fear of legal vengence from WotC.
A lot of gamers still like to old rules and many games are played here with them.