Batch File Utility 

Batch File Utility is a folder and file renaming utility,that supports wildcards and regular expressions with a variety of renaming features,including options to change case, replace strings, set file attributes, rename mp3 files.
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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, ...
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Light Web Searcher 

In a difference from the Google-like global searching systems, "Light Web Searcher" provides only local information searches in concrete sites. Regular expressions can be used in search queries.
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CodeThatPacker 

CodeThatPacker is a powerful JavaScript compression utility. CodeThatPacker removes comments and whitespaces from your scripts, supports all JavaScript syntax including regular expressions and automatic semicolon insertion, can copy several js-files.
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Examine32 

Examine32 is a fast and versatile text search utility. It can search both text and binary files using ordinary text, logical operators, and GREP-like regular expressions. Files within ZIP archives can be searched.
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THE Rename 

Rename files and folders, pictures with their width and height and EXIF tags. Rename MP3, VQF, OGG and WMA files. Possbility to export tags from musical and pictures files. Rename files with regular expressions.
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