wxMEdit is a cross-platform Text/Hex Editor written in C++ & wxWidgets.
wxMEdit is an improved version of MadEdit which has been discontinued.
wxMEdit supports many useful functions, e.g. Bookmark, Syntax Highlightings,
Word Wraps, Encodings, Column/Hex Modes, Updates checking, and a
Plugin system(not work yet).
In HexMode, wxMEdit can open large files which size is up to 32GB (INT_MAX*16).

NOTE: This is only to provide appimages, I am not the developer.