SGE is a PC/Amiga based utility for manipulating the graphics within Speccy snapshot files. It allows you do all manner of tasks including viewing, editing, copying, exporting and animating. It comes in three different flavours so zoom over to the download page and see what's available.
The Amiga version has become available thanks to the talents of Chris Young who kindly offerend to port over the original DOS version.
This isn't strictly a Retrospec game as it was done before Rich joined Retrospec. But here seems a nice place to store it :)