CheckerGames
CheckerGames is the cleanest free-checkers experience on the open web. Three AI difficulty levels for solo play, two-player pass-and-share on one screen, every classic variant (standard 8×8 American checkers, 10×10 international draughts, and a handful of regional rules) plus three board skins — classic wood, neon, and minimal. No download. No signup. Loads in seconds on phone, tablet, or laptop. The whole site is built around the idea that you should be playing within ten seconds of clicking the link.
Why we picked it: the variants alone make it worth a feature — most free-checkers sites only do the 8×8 American game and you outgrow it inside a week.