grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...
IDA - The best-of-breed binary code analysis tool, an indispensable item in the toolbox of world-class software analysts, reverse engineers, malware analyst and cybersecurity professionals.
dnGREP - dnGrep allows you to search across files with easy-to-read results.
Okteta - Okteta is a simple editor for the raw data of files.
PowerGREP - Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...
Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows