One can find thousands of Puzzles and Sudoku websites on internet which provides good quality puzzles. However http://krazydad.com/ is one of my favorite Sudoku and Puzzles website. Its contains thousands of puzzles and Sudoku which one can download, take printout and solve. Now this website has provided online interface to solve these puzzles. So now if someone is not having printer to print these puzzle need not worry as one can solve all these puzzles online. One feature which are feel is very much required is that storing the timing for a user for a particular puzzle. This feature as of now is missing from this website. I am sure that this feature will be soon implemented at this website.
I highly recommend this website for the people who love to solve Logical Puzzles and Sudoku.
Some of puzzle types are mentioned below for which one can play on this website
Galaxies and many more