World of Solitaire - Over 50 beautiful free web based Solitaire games. Klondike, Spider, FreeCell and more.
BVS Solitaire Collection - Award winning collection of solitaire card games for Windows/macOS and iPad/iPhone.
Microsoft Solitaire Collection - Play Klondike, Spider, Freecell, Pyramid, and TriPeaks! Plus, Daily Challenges!
PySolFC - PySolFC is a collection of more than 1000 solitaire card games. It is a fork of PySol Solitaire.
Solitaire.gg - Massive open-source solitaire project with hundreds of games.
Sage Solitaire - A new twist on solitaire from the maker of SpellTower