Top 4 chemical-engineering open source projects

This application allows calculate heat integration for heat exchangers using Python on console mode

DWSIM - Open Source Chemical Process Simulator, version 4

General purpose tools for high-throughput catalysis

Do you work with chemical reactors? Are you curious about them? ASALI is the open-source code that you are looking for. Chemical reactor models, transport/thermodynamic properties of gases, equilibrium calculations. ASALI couples all these features with an user friendly graphical interface. Modeling catalytic reactors has never been so easy.