BigJig

This game is the most fantastic in its kind!
It is just like a real one (cardboard pieces): you click on the piece, drag it to another one and see if it fits.

You can choose whether to hear a click if the pieces fit and stick together or to see a flash or both, or neither.
There are two windows to play: you can use one to place the pieces you're not actually using and the other one to keep the pieces that you've already got in place. And you've got four useful pockets you can use to select the pieces by colour, by some picture's detail or other.
You can choose whether you want the pieces to appear in their correct position or the "with rotation" option.
To help you piecing the jigsaw together you can see a thumbnail of the picture you're playing with and you can keep it always on the top or not, just as you like.
You can select single pieces or groups of pieces on both windows and all pockets to send them to another window or to arrange them in a grid just with a click.
The game comes with several pictures so you can start playing immediately after downloading and installing, and you can get a free picture to download weekly at the site.
It has a user friendly interface and it comes with a comprehensive help file.
It supports several languages including Chinese, Greek and Polish, to mention the most unusual ones.
When you register, you access to JigMake, the software to make your own jigsaws with any image file you like from the Internet, CDs or digital photos.
After registering you access to a gallery of pictures that include paintings by famous artists, worldwide photos and pictures for kids.