Blobs

A B1 favourite. Remember to think about the consequences of your move BEFORE you move!
http://www.primarygames.com/puzzles/strategy/blobs/index.htm

Frendz

This is a great game which involves you thinking about your strategy as you play. Be warned… this is very VERY addictive!
http://www.primarygames.com/puzzles/frendz/index.htm