Each day, Sudokular pumps out a new sudoku for you to work on, with different difficultly levels. A timer tracks how fast you can finish the challenge. There is a ranking system and a hall of fame.
If you just need something to do for the time being, but don’t need a new Sudoku each day, you can just click on Quick Game and a new game is automatically generated.
If you are banging your head on your desk trying to solve that really difficult sudoku in today’s newspaper, you can stop. Sudokular will solve the puzzle for you if you input the number from the paper puzzle into the solver.
For RSS addicts, Sudokular offers an RSS feed of new sudoku puzzles each day. Here is the link.