texpict – Create drawings for LaTeX
A graphical program developed with Tcl-Tk (it must be installed on the system) for the creation of drawings for inclusion in LaTeX file as picture environments.
Free license not otherwise listed, or more than one free license applies
graphics produced by one of the *TeX engines
prepare graphics for use with *TeX
Maybe you are interested in the following packages as well.
- prerex: Interactive editor and macro support for prerequisite charts
- epsfx: A TeX macro package for including EPS graphics
- epic: Enhance LaTeX picture mode
- pstricks-add: A collection of add-ons and bugfixes for PSTricks