Semicolon Software
- Features articles about winning at multiple solitaire variations.
- http://www.semicolon.com/Winning.html

dogMelon
- Provides rules, descriptions, and graphical examples of multiple solitaire games.
- http://www.dogmelon.com.au/solhelp/

United States Playing Card Company: Solitaire Games
- Features rules and instructions for multiple variations.
- http://www.usplayingcard.com/gamerules/solitairegames.html

Solitaire Laboratory
- Features solutions and descriptions for Freecell, Giza, Pyramid Puzzlements, and Fourteen Out.
- http://www.solitairelaboratory.com/

Solitaire Strategy by ChessandPoker.com
- Nine-step decision making process that guides a player to the correct play. Also presents specific strategies for Klondike.
- http://www.chessandpoker.com/solitaire_strategy.html

Card Games: Competitive Patience
- Rules for four variations of multi-player patience (solitaire) and links for one-player games.
- http://www.pagat.com/patience/

BVS Solitaire Collection
- Provides introduction and rules for a several original solitaire variations.
- http://www.bvssolitaire.com/rules.htm

Solitaire Central
- Rules, descriptions, and pictures of patience games. Also offers web-based game software.
- http://www.solitairecentral.com/