Analog Insydes is a Mathematica toolbox for symbolic analysis of analog electronic circuits. This project provides a set of free add-ons to Analog Insydes, including a Java front-end and a native netlister for Cadence's Analog Design Environment (ADE).
Little b is a Lisp-based language which allows scientists to build shareable, reusable mathematical models of complex systems based on shared parts. The initial focus is molecular and multicellular networks.
Project web page: http://www.littleb.org