Batch Word Replace - Replace text in, add or remove content, and edit thousands of Word documents in doc and docx formats, PDFs, RTF documents, and other text documents.
Multi String Replacer - Replace multiple strings at once!
regexxer - regexxer is a nifty GUI search/replace tool featuring Perl-style regular expressions.
Advanced Find and Replace - Search files with smart queries as with Google, replace simple or multiline text in multiple files.
Doxillion - Download fast and easy to use document file converter for PC or Mac. Convert Word, Doc, Docx, PDF, WPS, ODT, TXT, RTF, WPD, HTML, XML, word perfect and more source code file types. Freeware for home use.
Actual Search And Replace - This is an advanced tool to perform the search and replace operations across multiple text files. It supports the regular expressions syntax. The batch replace operation allows to execute a lot of various replacements with one click.