Search Regex adds a powerful set of search and replace functions to WordPress that go beyond the standard searching capabilities, with full regex supp
re.place adds content filter wich searches in posts for specified patterns (regular expressions) and replaces matches found with specified strings.
Use a shortcode to include a file (or just a part of a file by using text delimiters) into the current post from any URL, or from the local server.
rexCrawler is a regular expression web-crawler plugin. Able to parse websites, save data and show them on pages.