by puzzle type

anagram breviloquent crossword cryptogram diacrostic
dovetail fill-in initialism matching missing word
multiple choice swapword synonym transletter word search

Many of the PQs contain more than one puzzle type. But if you're looking for something involving a certain kind, you can find it here.

by subject matter

animals family relationships food & drink
geography language stage names superstars

Not all the PQs are listed under a subject matter. But here you can find multiple puzzles with a similar theme.