There are 2 repositories under chemical-formulas topic.
Library for mass spectrometry projects
A high-performance chemical equation parser and balancer
ChemFormula is a Python class for working with chemical formulas. It allows parsing chemical formulas, calculating formula weights for stoichiometric calculations, and generating formatted output strings (e.g. HTML).
Simple Chemical Reaction Calculator
Python wrapper for the DIMEdb REST API.
An application that provides information about the chemical elements, and allows conversion between mole and mass fractions for a user defined chemical mixture of up to four components.
Solving basic chemical equations, project for MFF CUNI CZ studies, in pascal
Convertor between chemical formulas and their CZ systematic names
Modern build system for embedding IUPAC formats into C and C++ projects