Yes, You Can Write More Than One Letter in a Square - The New York Times
Word squares 5x5 with hints/letters BOOM distance learning word puzzles (easier)
Rex Parker Does the NYT Crossword Puzzle: Classic letter puzzle parsed differently / THU 3-1-18 / Chewed stimulant in mideast / Karakum Asian desert / Tee shot goof / Blue area on Risk board
English Crossword puzzle - Apps on Google Play
Crossword Puzzles Word Game – Apps on Google Play
The best crossword solvers for Android, iOS, and the web that actually work