Finders Keepers 

Search files 4 ways: plain-text, grep expressions, fuzzy, and sound-alike. Find even misspelled text. View files 6 ways. Replace text in multiple files. Index files to find a word on your hard drive in less than a second! Zip found files.
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ZipWorx Explorer 

ZIP Compatible Software offers better compression, faster operations, new wizards, tools and windows-explorer integrated modules! Highly customizable User Interface featuring toolbars, menus, Internal support for extracting more archive type!
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Filehunter 

Filehunter finds files, search files,search results, search zip files, regular expressions, explore, view files, display search strings, match text ,multiple text, uses files extensions & dates, files size, text, attributes & case sensitive,
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