Bio Puzzles - Offers biology and natural history themed puzzles. Several free samples to download. - http://www.biopuzzles.co.uk
Puzzle People - Offers books and monthly magazine subscriptions with standard, cryptic, clueless, and trivia crosswords. - http://www.puzzlepeople.com.au/
Puzzle Buffs International - Featuring books on many different styles of crosswords and solving dictionaries. - http://www.puzzlebuffs.com/
Merl Reagle's Sunday Crosswords - Sunday puzzles from the San Francisco Examiner available for purchase. - http://www.sundaycrosswords.com/
Lovatts Crosswords and Puzzles - Leading Australian publishers of crossword magazines. Play online samples or subscribe. - http://www.lovatts.com.au/
Lace 2 - Crossword dictionary with over 230,000 words and phrases, including specialized lists. Available for purchase. - http://www.crossword-cracker.co.uk/