Batch Docs - 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.
dnGREP - dnGrep allows you to search across files with easy-to-read results.
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.