StarOffice Gallery is a format associated with the StarOffice office suite, and early versions of OpenOffice.org. It is apparently for clip art, and document themes/templates. For related formats, see StarOffice binary formats.
It is usually in the form of three files, with extensions .sdg, .sdv, and .thm. The SDG file apparently contains images. The SDV file uses Microsoft Compound File format.
- https://archive.apache.org/dist/incubator/ooo/stable/ - Old versions of OpenOffice.org
- XnView claims to support SDG