The GD Graphics Library aka libgd is an open source C library for reading, writing, and manipulating images developed by Thomas Boutell and others. It works with the GIF, JPEG, PNG, and [WBMP] image formats.

Bindings for Tcl  edit

• gdtcl
• gdtclft
• fly
• Michael I. Schwartz's Tcl extension at http://schwartzcomputer.com/tcl-tk/tcl-tk.html
• tclgd

Out of these gdtclft and tclgd are maintained as of 2018.

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