HxD - HxD is a carefully designed and fast hex editor which, additionally to raw disk editing and...
TrID - Allows to detect file type by recognition of binary signatures.
WinHex - WinHex hex editor, disk editor, RAM editor. Binary editor for files, disks, and RAM. Download HEX EDITOR. Sector editor. Drive editor.
TrIDNet - TRIDNet is the GUI version of TrID, probably more practical to use than the CLI version, especially...
IDA - The best-of-breed binary code analysis tool, an indispensable item in the toolbox of world-class software analysts, reverse engineers, malware analyst and cybersecurity professionals.
Toolsley File Identifier - Identify files based on the libmagic database in your browser.