David Gunkel has released Sudokumat 5.5 which not only lets users go sudoku crazy, but also generate PDF-based Sudoku books.
This quirky little tool features a toolbar for boosted Sudoku functionality and users can save single puzzles in flat text files. The program also features display of a tracker that highlights fields for application of Sudoku rules and shows users all permitted positions for any given digit.
Sudoku enthusiasts can purchase Sudokumat 5.5 at Gunkel's web site and is available for free.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.