regexxer is a nifty GUI search/replace tool featuring Perl-style regular expressions. It's inspired by the project-wide search dialog of the Sniff+ IDE, but aims to surpass it in both usability and features.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This long-awaited maintenance release comes with a new command line interface for better integration with other applications. The user interface has been modernized to make use of new GTK+ features, such as the file chooser button. A sizable number of new translations has been added.