Software

DKM Sudoku Online - Play online puzzles at one of four difficulty levels. Also includes a solver program and hints. Software for Pocket PC and Windows also available.
www.dkmsoftware.com/Sudoku/

Erational Sudoku Helper - Flash application to assist in solving puzzles by using basic scanning techniques. Download and source code available.
www.erational.org/software/sudoku/

Galford's Sudoku Solver - Allows step-by-step solutions and gameplay. [Windows]
members.aol.com/aunegl/Galfords-Sudoku-Solver.html

Simple Sudoku - Freeware puzzle creator for Windows.
angusj.com/sudoku/

Su Doku Master - Sudoku puzzle generator and solver software for Mac OS X.
www.groethe.org/sudoku/sudoku.html

Sudogo.com - Offers puzzles in PDF and mySQL formats for solving offline or building into custom applications. Also offers online puzzles with three difficulty levels and customizable look-and-feel. [Dutch/English]
www.sudogo.com/

Sudoko Solver by Logic - JavaScript-based solver which attempts to complete grids by logic. Includes step-by-step description as well as suggesting a single move. Offers challenge to find new logical methods for "unsolvable" puzzles.
www.sudokusolver.co.uk/

Sudoku Companion - Sudoku puzzle generator for Mac OS X.
www.verek.com/products/sudoku_companion/index.html

Sudoku Dragon - Shareware puzzle solver. Generate and solve puzzles, print out the grid for solving by hand, tips and tutorials with online discussion forums. [Windows XP/2000/Me/98]
www.sudokudragon.com

Sudoku Java Solver Applet by Klaas - Java-based brute force solver. Displays animation of solution. Solves pre-defined puzzle or allows the user to enter his or her own puzzles.
sudoku.klaas.nl/

Sudoku Sensei - Open source application which describes the logic used to solve a grid, rather than using a simple brute force solution. Includes source code and samples. [Windows 95/98/NT/2000/XP, Linux]
sourceforge.net/projects/sudoku-sensei/

Sudoku Solver - A free utility to solve and email Sudoku puzzles.
www.sudoku-solver.com

Sudoku Solver - .NET solving program. Either offers hints or solves entire puzzle.
www.sudokusolver.net

Sudoku Solver in Three Lines - Explained - Small bit of perl code that will generate a sudoku puzzle solution.
www.ecclestoad.co.uk/blog/2005/06/02/sudoku_solver_in_three_lines_explained.html

Sudoku-Help - Excel-based shareware helper application.
www.sudoku-help.com/

SudokuME - Open source Sudoku game for any Java enabled phone. Includes downloads, a game manual and user forums.
smmj.sourceforge.net/sudoku/

Super Doku - Sudoku game available for Motorola V400.
www.clickgamer.com/moreinfo.htm?pid=3117&section=J2ME&set_device=1465