regexxer is described as 'nifty GUI search/replace tool featuring Perl-style regular expressions. If you need project-wide substitution and you’re tired of hacking sed command lines together, then you should definitely give it a try' and is an app in the Development category. There are more than 25 alternatives to regexxer for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and BSD. The best alternative is grepWin, which is both free and Open Source. Other great apps like regexxer are grep (Free, Open Source), dnGREP (Free, Open Source), Search Monkey (Free, Open Source) and AstroGrep (Free, Open Source).
Rummage is a cross platform tool for crawling directories and searching and replacing in text files. It is written in Python and uses wxPython for the GUI. Rummage allows for literal or regex searches and has configurations for limiting the files etc.
A very capable Windows Grep, search, replace and data extraction tool. - Search for files using powerful text matching commands called Regular Expressions. - You can search/replace one or more than one information on one or more than one file resources.
KFileReplace is a KDE utility that replace some strings with others in a lot of files in an only operation. Then it's very easy to update some URLs, filenames, ... which are written in all files of a project.