Transcalc is an analysis and synthesis tool for calculating the electrical and physical properties of different kinds of RF and microwave transmission lines. It uses GTK+ for its user interface. For each type of transmission line, it presents you with dialog boxes which allow you to enter values for the various parameters, and either calculate its electrical properties (analyze) or use the given electrical requirements to sythesize physical parameters of the required transmission line.
SoC GDS is a platform for enabling hierarchical SoC integration and verification across traditional EDA frameworks based on Virtual Components per the VSIA guidelines. It is also a fast viewer and processor for native GDSII files. It encompasses a set of powerful functions allowing automatic cell renaming, grid verifications, GDS II files merging (AND), physical comparison (XOR), hierarchy modifications, and conversion to text format.
pdnmesh is an automatic, 2D Delaunay mesh generator, and a solver for finite element analysis. It is capable of producing PostScript output of the mesh and contours. It is possible to use DXF files as input after filtering. It requires GTK/GtkGLExt and Mesa/OpenGL or MFC (Win32), and is written in C.