HexWalk - Hex Editor/Viewer/Analyzer

HexWalk is an Hex editor, viewer, analyzer.

It is opensource and you can check it out on GitHub:

Based on opensource projects like qhexedit2,binwalk and QT.

It is cross platform and has plenty of features:

Advanced Find (can find patterns in binary files based on HEX,UTF8,UTF16 and regex)
Disassembler
Binwalk integration
Entropy Analysis
Byte Map
Hash Calculator
Bin/Dec/Hex Converter
Hex file editing
Diff file analysis
Byte Patterns to parse headers