grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
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, ...
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
dnGREP - dnGrep allows you to search across files with easy-to-read results.
XYplorer - File Manager for Windows