Programming libraries providing other applications with object-oriented accessibility to a given set of capabilities

Case - Generalized function optimization, e.g. molecular structure optimization

Lexichem - Structure-name interconversion

OEChem - Cheminformatics for molecular modelers

SCUT Monkeys - All the useful apps that are included with OEChem

Ogham - 2D depiction toolkit

Shape - Molecular shape comparisons based on 3D overlays

Zap - An efficient Poisson-Boltzmann electrostatics solver