HxD - HxD is a carefully designed and fast hex editor which, additionally to raw disk editing and...
GNUPGK - A GnuPG Frontend GUI made in C#.
WinHex - WinHex hex editor, disk editor, RAM editor. Binary editor for files, disks, and RAM. Download HEX EDITOR. Sector editor. Drive editor.
TheLetterEncrypter - TheLetterEncrypter is a small (14KB download) AES-based text-encryption program.
Hex Fiend - A fast and clever open source HEX editor for Mac OS X.
CTI Text Encryption - CTI Text Encryption is an encryption tool that can encrypt any text from messages and articles to codes, etc.