The GoRilla program is freeware for Windows, and is available from this web page.

Use GoRilla to store and replay your games and the games of the professionals. Use it whenever you need to display a quick game board from your desktop. GoRilla is a compact product that can stand alongside the existing SGF editors and offer some original functionality. I hope that you will find it an enjoyable and useful product and that it will help you improve your skill at these games.