JigSaw Maverick - Shareware game available for download.

Cascoly Puzzle Games - Puzzle games based on original photographs from around the world, adjustable difficulty. Quadzle for Win95, Winzle for win3x.

Jigsaws Galore - Windows jigsaw program will play and create jigsaws from 4 to 4,000 pieces. Shareware. Gray Design Associates.

PuzzleJig - jigsaws game for all - Jigsaw game for Windows where any number of pieces can be chosen, create custom puzzle from bitmap files or by drag-and-drop. Can save game in progress. [shareware]