TextCrawler is a great tool for anyone who works with text files. This program enables you to instantly find and replace words and phrases across multiple files and folders. Regular expressions are supported for extra power. Other features include fuzzy searches, a batch processor for complex operations, a scratchpad (copy, paste, sort, de-dupe text), text extraction (rip text from files), a regular expressions testing suite and a character map. TextCrawler is freeware.