If you’re stuck on a slow train and need a quick mental break, give Solitaired...

https://www.cast-bookmarks.win/if-you-re-tired-of-sites-forcing-you-to-make-an-account-just-to-play-a-quick

If you’re stuck on a slow train and need a quick mental break, give Solitaired a try. It is my favorite for fast, no-login play that gets you straight to the cards. The best part is the massive variety of games, so you never get bored