wxHexEditor
Open Source
wxHexEditor is an open source cross-platform hex editor written in C++ and wxWidgets. It can work as low-level disk editor too.
Bless
Open Source
Bless is a high quality, full-featured hex editor.
010 Editor
Commercial
010 Editor is a text editor.
Compare PE Explorer with alternatives
Compare wxHexEditor and PE Explorer and decide which is most suitable for you.
Compare 010 Editor and PE Explorer and decide which is most suitable for you.