One of my side projects has borne some fruit. Meet Hex Fiend, a new hex editor for Mac OS X. (Hex editors allow you to edit the binary data of a file in hexadecimal or ASCII formats.) Click here to read more, see screenshots, or download Hex Fiend Hex Fiend allows inserting and deleting as well as overwriting data. It supports 100+ GB files with ease. It provides a full undo stack, copy and paste, and other features you've come to expect from a Mac app. And it's very fast, with a surpris...