TrID - Allows to detect file type by recognition of binary signatures.
Fiji - Fiji: A batteries-included distribution of ImageJ.
TrIDNet - TRIDNet is the GUI version of TrID, probably more practical to use than the CLI version, especially...
ImageJ - and Other Health Care
Toolsley File Identifier - Identify files based on the libmagic database in your browser.
MIPAR - MIPAR is a revolutionary image analysis software, capable of identifying and measuring features...