From HHD Software:
Hex Editor Neo Ultimate is a full-featured easy-to-use product for professionals who need all the power to deal with binary data. It has ultimate product functionality and flexibility to do your job quick and easy. Hex Editor offers you all basic functionality of the Free Hex Editor as well as a number of extended features. They include multiple selection, powerful Find All and Replace All commands, Go-To and Fill commands, Bookmarks and printing capabilities.
Features include support for NTFS alternate data streams, file comparison, checksum calculation, and data encryption and decryption. File document scripting, scripting in structure viewer, x86, x64, and .NET dis-assembler.