Swiss army knife of image processing
GraphicsMagick provides a set of commandline tools and programming APIs for manipulating, editing, and converting raster and vector images. It is derived from ImageMagick, with the objective of providing better stability and performance than ImageMagick while retaining the original MIT/X11 license.
OTcl, short for MIT Object Tcl, is an extension to Tcl/Tk for object-oriented programming. TclCL (Tcl with classes) is a Tcl/C++ interface used by Mash, vic, vat, rtp_play, ns, and nam. It provides a layer of C++ glue over OTcl.
The Tcl UDP extension provides a simple library to support UDP socket in Tcl.
Realtime 3D game/visualization engine, written in C++, scriptable through Tcl/Tk, Python and Lua. Supports D3D and OpenGL for rendering, runs under Linux and Windows.
An editor for wish scripts. Includes an interpreter to test scripts without having to save edits. The interpreter provides a console (regardless of OS) to aid in debugging. Written in pure tcl/tk - no extensions required.
Extended Object Tcl (for short: XOTcl) is an object-oriented scripting language based on Tcl. It was originally designed for providing language support for design patterns and provides novel constructs such as filters or transitive mixin classes.
Lightweight, modern, flexible and well-customisable cross-platform multi-protocol instant messaging client
Metakit is an efficient database library with a small footprint. It's a cross between flat-file, RDBMS, and OODBMS. Keywords: structured storage, transacted, load on-demand, portable, C++, Python, Tcl, instant schema versioning.