M Card Games lists card games whose names start with M and links to play most of them in your browser. The page shows about 50 games, grouped into Memory, Solitaire, card strategy and card puzzle games, including Montana, Monte Carlo and Miss Milligan.
It also has the site's own ad-free Memory game. No site account is needed, and third-party games may show ads.
I wanted one simple place to find and play card games that start with M, free in the browser, without downloads or accounts.