BioWin - BioWin
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
STOAT - STOAT - a dynamic sewage treatment works modelling package
C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation
D (Programming Language) - D is a language with C-like syntax and static typing.
DWSIM - DWSIM is an open-source CAPE-OPEN compliant chemical process simulator for Windows and Linux.