BrainDen.com – Fun brain teasers for kids and adults

Printable Puzzles – One of my favorite sites to get logic puzzle and all sorts of fun puzzles.

BrainBashers – BrainBashers™ is a collection of brain teasers, puzzles, riddles and optical illusions. ABC path is a favorite puzzle from this site under puzzles. 

Conceptis – Many fun puzzles.

Cryptogram.org – The American Cryptogram Association (ACA) is a non-profit organization dedicated to promoting the hobby and art of cryptanalysis — that is, learning to break ciphers. Many links on their resources page. 

Cryptograms by Gregory Bard – Scroll down the main page to get aristocrats, patristocrats, and xenocrypts. Crypto Club – Encrypt, decrypt, and crack messages using cipher tools.