REHex

Features:
- Large (1TB+) file support
- Decoding of integer/floating point value types
- Inline disassembly of machine code
- Highlighting and annotation of ranges of bytes
- Side by side comparision of whole files or selections
- Lua scripting support (API reference)
- Virtual address mapping support
- Support for common text encodings (ASCII, Unicode, ISO-8859-X, etc)
- Import and export of Intel HEX files.
- Bitmap data visualisation.
- Binary Templates for automatically annotating data (similar to 010 Editor).
- Bit editing/manipulation.
- Checksumming of files/selections.

An online copy of the manual can be accessed here: https://www.solemnwarning.net/rehex/manual/