Lfhex - Large file hex editor.

Features:
   - Low memory usage with respect to filesize. Opening a 2gig file requires
     only ~1.4megs of additional memory.
   - Fast load times.
   - Fast save times.
   - Infinite undo/redo.
   - Conversion dialog
   - Search function.
   - Shows modified regions in alternate color.
   - Scalable working area. Resize can use as much screen as you give it.
   - Multiple editing modes (can switch on the fly)
   - Runtime configurable bytes per column.
   - binary comparison user interface

WWW: http://stoopidsimple.com/lfhex