I’m Holger Sindbaek and I’m the creator of these Jigsaw puzzles games. I didn't invent jigsaw puzzles, but I made a nice online version of it.
All the jigsaw puzzles you see are available as a free download both for Windows™, Mac™, Linux™, iOS or Android.
If you like puzzle games I can highly recommend Mexican Train Dominoes game. It's a fun an free puzzle game where you play agains three opponents. You can choose to play against the computer and even invite your friends to play!