Solitaire Laboratory - Features solutions and descriptions for Freecell, Giza, Pyramid Puzzlements, and Fourteen Out. - http://www.solitairelaboratory.com/
Solitaire Central Rule Book: Klondike - Rules and instructions for a half dozen variations. Includes links to other Klondike sites. - http://www.solitairecentral.com/rules/klondike.html