Avalon Toolkit for SMILES-based cheminformatics services
The Avalon Cheminformatics Toolkit contains tools to render and canonicalize SMILES and manipulate MOL file and related formats as well as structure fingerprinting.
JOELib/JOELib2 is a cheminformatics library which supports SMARTS substructure search, descriptor calculation, processing/filtering pipes, conversion of file formats, 100% pure Java, and interfaces to external programs (e.g. Ghemical) are available.