http://www.sudokuonline.ro
Play Online Free Sudoku Puzzles and Variations with four levels of difficulty. Browser based, allows multiple values, shows wrong values, includes hints, intuitive and simple interface.
http://historiddle.50webs.com/
Collection of internet puzzles, riddles and brain teasers based on historic and anecdotic events. Solve the puzzle for each year, find the hidden puzzles and reach the rank of master.
