TeXCAD
From AdaCommons
http://texcad.sourceforge.net/
Description
TeXCAD is a program for drawing or retouching {picture}s in LaTeX.
The features of environment {picture} are quite limited, but it presents the great advantage of requiring no add-on and being displayed on all devices.
You also enjoy the same fonts, macros, formulas as elsewhere in your LaTeX document.
In addition, TeXCAD extends the original {picture} capabilities, even without any obligatory LaTeX package, class or style sheet.
Furthermore, you can still switch on some supported add-ons, but are not obliged to.
License
GPL

