Crossword Blitz lets you play an unlimited number of challenging, automatically-generated puzzles. No Internet connectivity is required which is a big attraction here.
I’d recommend this one for all crossword buffs.
Mega Crosswords To Go
This app contains several unique and challenging crossword puzzles for solvers of every level and interest. Again does not need a WiFi or 3G connection
Another good app that can keep you amused for a while
You’d expect a crossword app from the NYTimes to be good and this one is prett good although a lot of the top content is only available via in-app purchases that can get quite expensive there are still a couple of free options to keep you entertained.
Its worth a look
This is the light version of a paid app but still contains many puzzles to keep you interested. Over 40 new ones added in the latest update. Enough to try out and keep you entertained.
Crosswords for Commuters Free
This app features 100+ FREE puzzles designed specifically to be played while you’re on the go. Again enough free puzzles to while away some time and the app does updated with new puzzles. App is ad supported but these can be removed with an in-app purchase
This app only contains 14 puzzles for free but if you pay you will access to 141 puzzles. The 14 puzzles are challenging enough to warrant a download to your iPad and play.
Crossword Puzzles +
800+ free crossword puzzles including but not limited to classic crosswords, keywords, anagrams, scandinavian crosswords and much more! This is one of the best for the sheer quantity of puzzles that you can get for free on your iPad