ClassRoom6X - https://sites.google.com/site/classroom6x/
MonkeyGG2 - https://evilmonke.codeberg.page/games/
LichGames - https://lichgames.s3.amazonaws.com/index.html
LotsOgames - https://sites.google.com/view/lotsogames
NYtimesGames - https://www.nytimes.com/crosswords