Scicos is a graphicaldynamical systemmodeler and simulator. User can create block diagrams to model and simulate the dynamics of hybrid dynamical systems (continuous and discrete time) and compile such models into executable code. It is used for signal processing, systems control, queuing systems, and to study physical and biological systems. There is a Scilab toolbox called Xcos that is based on Scicos.
It is developed in and distributed with the scientific software package ScicosLab. Scicos 4.4.1 has been released in April 2011.
The book Modeling and Simulation in Scilab/Scicos with Scicoslab 4.4 by Stephen L. Campbell, Jean-Philippe Chancelier and Ramine Nikoukhah, provides an overview of the software.