ChemDraw - ChemDraw - The Gold Standard for Chemical Structure Drawing and Research Publications.
TrID - Allows to detect file type by recognition of binary signatures.
ImageJ - and Other Health Care
TrIDNet - TRIDNet is the GUI version of TrID, probably more practical to use than the CLI version, especially...
Gnome Chemistry Utils - The Gnome Chemistry Utils include six chemistry related programs:
Toolsley File Identifier - Identify files based on the libmagic database in your browser.