Crossword Forge allows you to easily make and share classroom style crossword puzzles and word search puzzles.
Puzzles for the Web, Print, & PDF
Mac + PC
I love this program. It is fantastically easy to use. It is cross platform and produces high quality output for both paper and online crosswords.
Check out my science vocabulary crossword here.
£26 download.
www.solrobots.com/crosswordforge