Peshmerge Morad

This plugin is created to enable WordPress site owners to specify a regex string to be used with Gravity Forms text fields. 
Once a regex string is specified, the user can’t submit that form until the user enters a text that comply with the regex string.

Regex Textfield: Gravityforms Add-on

A WordPress plugin and GravityForms addon to enable users to use regex string on text input field to control user input.

Lars.D.Rasmussen

rexCrawler uses regular expressions to crawl specified websites. 
Websites are saved in user-defined groups, which can then be showed on wordpress pages/posts using shortcodes. 
The data crawled by rexCrawler is saved in the WP database in custom tables. Once data has been crawled, it can be inserted 
into a page using the shortcode [rexCrawler]. Refer to the documentation on <a href="http://www.rexcrawler.com" rel="nofollow ugc">http://www.rexcrawler.com</a> for more information on how to use rexCrawler.

rexCrawler

rexCrawler is a regular expression web-crawler plugin. Able to parse websites, save data and show them on pages.

Regex Textfield: Gravityforms Add-on vs rexCrawler