- Fiendish Sudoku
Five new puzzles every day, online solving grid with three grid sizes, hints, step-by-step solutions, optional pencilmarks. Print puzzles at one of five sizes.
- Sudoku Hints
Five new puzzles every day, online solving grid, choice of three grid sizes, hints, optional pencilmarks, solutions.
- Sudoku Online
Online solving grid with hints, manual or automatic pencilmarks, solutions.
- Number Logic
Daily puzzles, online solving grid, pencilmarks not automatically computed but you can add them by hand. No hints or solutions.
- Sudoku Assistant/Solver
Online solving grid. Graphically illustrates advanced solving techniques.
- BrainBashers Sudoku
Three daily puzzles, online solving grid, optional pencilmarks.
- SourceForge Su Doku
Open source solver.
- Sudoku Master
Two new puzzles every day, basic online solving grid, no pencilmarks or hints.
- Web Sudoku
Basic online solving grid. Pencilmarks not automatically computed but you can add them by hand. No hints or solutions.
- Sudoku Shack
Basic online solving grid. Pencilmarks not automatically computed but you can add them by hand. No hints or solutions.
- Sudoku Scratch Pad
Three new puzzles every day, online solving grid, pencilmarks, hints.
- Free Sudoku
Basic online solving grid. No pencilmarks. Multiple grid sizes. Hint button just gives next step without explanation.
- Sudoku Helper
Online solving grid with awkward number entry, can't turn off pencilmarks.
- Sudoku Prime
Quirky online solving grid with optional pencilmarks.
- Su Doku Solver
Quirky online solving grid.
- sudoku.name
Basic online solving grid, no pencilmarks or hints.
- Su Doku Solver (Perl)
Perl script to solve sudoku puzzles on the command line.
- Sudoku Solver (Java)
Requires Java, no pencilmarks or hints.
