Pyramid Solitaire is a free classic card game. It has Easy (3 Help Stores), Medium (2 Help Stores) and Hard (1 Help Store) modes.
https://interalt.net/
http://www.solitaire-pyramid.com/
http://www.pyramidsolitaire.net/
http://gregorhaag.com/
https://ludado.com
http://www.5games.com/
https://ludado.com
http://www.thelogicgame.com/
http://www.netsolitaire.com/