Ichiban Sudoku
Ichiban Sudoku is the "A Number 1" sudoku program, bringing the worldwide puzzle sensation to life on your home computer. With four levels of infinite puzzle creation, the fun never ends. Create, Print, Solve or Hint - Ichiban Sudoku has it all. Marking and solving the squares is a thing of... You can play against the clock while you rock to the oriental hip hop soundtrack, it's all part of the engrossing experience that is - Ichiban Sudoku.
http://www.vellosoft.com/ichiban/ichiban.exe - 10Mb - Download - Screenshot

Collex Amanda
Collex Amanda is a Windows Puzzle / Arcade game. If you enjoy games like Breakthru, Tetris and Kye you'll like Collex Amanda!. The object of the game is to navigate the green collector ball, "Your box", through a block based game field to collect Number and Star boxes. ... (similar to Pac Man) The Number boxes however must be collected in numerical order. ... It is best to start at the easiest level and proceed to the next level as each level increases in difficulty. ... Sound card owners will appreciate the digital sound effects and Midi-based music.
http://www.webruler.com/mtreciokas/a1collex.zip - 435Kb - Download - Screenshot