* Add more transmission line types (in progress); we need feedback from users about the most important types, to be implemented first.

* Add detailed documentation with references for formulas used  (in progress); partly done with extraction of comments in the source code, but we need a better method of referencing articles (a la bibTeX / LaTeX)

* More options for command-line control

* Store common substrate parameters as a loadable database

* Show performance over a range of frequencies (using gnuplot ?)

* Add toolbars for frequently performed operations

* Print entire content of window in postscript file or printer

* The transmission lines parameters calculations should be separated from the GUI part and become a library, to ease reuse of the formula by other programs (CAD, simulators, etc.)

* A description of the transmission line should be saved in the .trc files and shown in a preview in the "File Load" window