Open Source C Vector Graphics Software

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.

XTrackCAD is a open-source, free, CAD program for designing model railroad layouts. You can easily create layout of any scale or size. Libraries for many brands, scales and gauges of track and turnouts/points and model structures are included. Adding new components is easy with the built-in editor. It runs on Windows, Mac and Linux,

darktable is an open source photography workflow application and non-destructive raw developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images, enhance them and export them on local or remote storage.

Xournal is a GTK+/Gnome application for notetaking, sketching, keeping a journal using a stylus on Tablet PCs and other platforms. It aims to provide superior graphical quality (subpixel resolution) and overall functionality.

NOTE: FontForge has moved to fontforge.github.io, newer binaries and sources are available at github.com/fontforge. FontForge allows you to edit outline and bitmap fonts. You may create new ones or modify old ones. It is also a format converter and can interconvert between PostScript (ascii & binary Type1, some Type3, some Type0), TrueType, OpenType (Type2), CID, SVG

Takes standard printer output produced by a DOS application, and forwards it to a default or selected Windows printer. Converts code page, strips empty pages, supports BOX DRAWINGS chars. Works on all Windows platforms. Written in Borland DELPHI.

See https://www.openorienteering.org/apps/mapper/

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

Sodipodi is general vector illustrating application for Linux/Unix and Windows. It uses W3C SVG as native file and in-memory image format and can do many neat things.

Box is a language specifically designed to make vector graphics easy plus a integrated development environment which facilitates the use of the language by interactively showing the graphical output. Box combines the convenience of drawing figures with the mouse with the convenience of describing them with a language tailored for vector graphics.

ImageStone is a powerful C++ class library for image manipulation. Its features include load, save, display, transformation, and nearly 100 special image effects. It can be used cross platform (includes Windows, Linux, Mac), and especially under windows it can be used as a DIB wrapper class.

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

A parametric, feature-based, sketch-driven 3D CAD application, built around a geometrical constraint solving engine. Project is in early development stage. The FreeSG library (http://freesg.org/) is required.

Drawing editors for PostScript, TeX, and web graphics. An embeddable and extendable vector graphic shell.

DiaCanvas is a library for drawing diagrams. It is completely Model/View/Controller based and has a Visio (DIA) look. The package also contains a Python wrapper for the library.

The Doodle project aims to provide a language to easily describe Origami diagrams and produces a ready-to-print document. Doodle will free creators from diagramming constraints and increase their capability to share their creations.

PLOT_PSXPS provides a set of graphic functions that allows the generation of PostScript files (and runtime viewing with X) from C/C++ programs. A page can contain points, lines, arcs, ellipses, circles, boxes, text, included EPS files and a lot more.

The aim of this project is to export the xfigure library (.xfig) to provide free stencils/shapes for kivio (.sml) and OpenOffice.org/StarOffice (.sxd,.wmf). The images (over 900) can be used in the OpenOffice.org`s Gallery.

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.

a collection of C++ classes (added a C version of the polygon stuff) dealing with paths, and polygons: filling, stroking, rasterizing, boolean operations, insets, offsets, anti-aliasing. Also classes to compute voronoi diagrams of sets of points and voro

Agar provides a base GUI framework and a standard set of widgets from which graphical applications can be built which run natively under X11, Windows, MacOS, SDL and others. It takes advantage of texture and GPU acceleration wherever available. Agar can also attach to an existing framebuffer, SDL or OpenGL context and operate as a self-contained window-manager. It includes a standard library of general-purpose widgets, and is also designed to be extended externally. New widgets can be implemented as part of an application or library. Complex user interface elements can be realized often in few lines of code. Agar is also extensible at the low-level. The low-level API is documented such that modular drivers can be written which enable Agar applications to work seamlessly under many platforms graphics systems without any change at the application level.

AniToolBox aims to be an Open Source and Free Computer Aided Animation program suite. Since the project is still in its initial planning phase, suggestions are very welcome.

CNC-Suite is an Free & Open Enviroment for 2D and 3D CNC-Machines

Codeum Scalable Vector Graphics is a tool that will run on BeOS. Its purpose to is to deliver 2D animation via SVG.

Fandango, formerly and internally know as elcad. It is a python scripted 3d CAD application; the core is programmed on C++, and interface functions are exported to python to be used as building blocks for new commands.