Connections
nytimes.com
Sixteen words, four secret groups, four mistakes allowed
Mind Benders
Learn CSS flexbox by getting frogs onto lily pads
flexboxfroggy.com
Coffee break · Best on desktop
Free, no sign-up · online since 2015
Twenty-four levels each hand you a pond and some misplaced frogs, and the only way to move them is by typing real CSS flexbox properties into the code panel. Levels introduce justify-content, align-items, flex-wrap and order one at a time, with the pond redrawing as you type.
You remember what align-items does because you watched a frog slide to the wrong side of a pond the first time you got it wrong.
Keep going
Picked for a shared category and overlapping vibe, not for popularity.
nytimes.com
Sixteen words, four secret groups, four mistakes allowed
puzzle-nonograms.com
Numbers along the edges, a picture hiding in the grid
puzzmo.com
A daily puzzle page designed by people who love puzzles
regexcrossword.com
Crosswords where every clue is a regular expression
semantle.com
Guess the word by meaning, not by letters
chiark.greenend.org.uk
Forty small logic puzzles, endlessly generated, no fuss