LEONARD's Sketch
From Just Solve the File Format Problem
LEONARD's Sketch is a vector graphics editor for Windows 3.x. It was developed by Gia-Loc Tran, in association with BOK Technologies & Consultants. It uses an .OGF file format.
Discussion
LEONARD's Sketch uses ObjectGraphics, a graphics library by The Whitewater Group (see Wikipedia article). The OGF format presumably has something to do with ObjectGraphics. The extent to which LEONARD's Sketch's OGF format is unique to it is undetermined.
Identification
OGF files are observed to start with bytes 0a 00, followed by ASCII "GraphSpace".
