The Open On-Chip Debugger
Platform-agnostic GUI supporting CVS, Subversion, Git, and RCS
Next Scripting Framework (NSF)
Proximus is an Electronic System Level (ESL) design environment.
Cross-platform C++ library for use as a default application framework.
Additional Graphical Classes and Widgets for Tkinter/Ttk
C++ Tcl interface library
A complete multi-language developement stack for GNU/Linux
something that writes code for you
A Tcl/Tk widget for OpenGL rendering.