Open Source C Drawing Software

Tux Paint is a free, award-winning drawing program originally created for children ages 3 to 12, but enjoyed by all! It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who guides children as they use the program. You're presented with a blank canvas and a variety of drawing tools to help them be creative. Along with paintbrush, shapes and text, Tux Paint includes a "stamp" feature to add pre-drawn or photographic imagery to pictures, and a set of "magic tools" that provide filter effects (like blur, tint and waves) and interesting drawing tools (like train tracks, bubbles and grass). Tux Paint includes a collection of "starter" images, both coloring-book style and photo-realistic, and a large collections of stamps are available as a separate download. Additional content can be added by parents & teachers, or downloaded from 3rd parties. Tux Paint is available for Windows, macOS, Android, Linux, & Haiku operating systems, among others.

Dia Diagram Editor is free Open Source drawing software for Windows, Mac OS X and Linux. Dia supports more than 30 different diagram types like flowcharts, network diagrams, database models. More than a thousand readymade objects help to draw professional diagrams. Dia can read and write a number of different raster and vector image formats. Software developers and database specialists can use Dia as a CASE tool to generate code skeletons from their drawings. Dia can be scripted and extended using Python.

Tgif is a vector-based 2D drawing tool. It's also a hyper-structured-graphics browser on the web.

GUI and command line tools for advanced users and administrators: wxdkdraw - Minimalistic drawing application for use with LaTeX, wxd2lat - Convert wxdkdraw files to LaTeX, bitmap2pp - Convert PNG/JPEG/TIFF/NetPBM to (E)PS or PDF, fig2lat - Convert XFig files to LaTeX, htmlbook - publish HTML like a book, dkcpre - C debugging and tracing preprocessor, itadmin - manage your IT using a MySQL/MariaDB database, dk-fic - file integrity checker, dk-ls - list files, output column order is configurable, dk-cat, dk-sort, dk-lines - text tools for *x and Windows, dk-send, dk-recv - transmit data stream, dk-t2h, dk-t2l - text to HTML or LaTeX conversion.

A UNIX/X11 circuit drawing application with schematic capture. Features user-definable parts libraries and fully hierarchical SPICE netlist generation.

Skencil is a vector drawing program. It's written almost completely in python for flexibilty with some modules written in C for speed.

Kaleidoscope drawing software with the facility to save in cross view stereo pictures.

ZuneFIG is the revival of AmiFIG vector drawing program for AROS. Previous version (AmiFIG) has been compiled for AmigaOS4 and is available on OS4depot. A very outdated build of AmiFIG for MorphOS can be found on aminet.

Vectronics is a way to share schematics. It makes quick svg images that can be displayed in a browser and reopened and reedited as a schematic. Hyperlinks can also be added to link to data sheets or source code. It is a simple xml based drawing program .