The GoRilla SGF editor is a freeware Windows program to store and review games of Go. The SGF gaming format is used. Branching and SGF Collections are supported, allowing many lines of play to be held and many games to be stored within a game file.
It is available from http://myweb.tiscali.co.uk/dashstofsk/gorilla.html
GoRilla will enable you to view the SGF files from the Go4Go site. I hope that you will find it a useful product.
I would like people to support me in my aim to develop the product further so I would like to ask for comments and suggestions for improvements. Please don't hesitate. All opinions will be welcomed.