tgif - 1:4.2.5-1.3+b1 main

Tgif (originally the "Tangram Graphic Interface Facility") is a
classic drawing program for 2D vector graphics. Image objects can
be hierarchically constructed out of primitives such as polygons,
text, and splines (though the splines Tgif draws are not Bézier
curves).
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It natively supports PostScript formats suitable for LaTeX, as well
as X11 bitmap or (version 1) pixmap formats. Other vector and raster
image formats such as SVG and PNG can be handled via filters.
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Tgif stores drawings as .obj files and individual building-block
objects as .sym files, both in Prolog-compatible fact file format.