A quite neat regular expression for URLs, e-mails..., I found on Matthew O'Riordan's blog.

Check for true or false street address format

A simple RegEx rule which should validate redirect_uri for oAuth2

Select a character (or string) ingnoring if that element is inside the HTML tags. Useful to apply html tags using replace.

CheckEmail Login start or end simbols [._- ] .login@domain.com - fail -login@domain.com - fail _login@domain.com - fail login.@domain.com - fail...

For scraping http://skepticsannotatedbible.com/

Valid PHP variable name as defined in the manual at http://php.net/manual/en/language.variables.basics.php

Matches case insensitive first name, optional unlimited number of middle names and last name separated with space format. Replaced \w with explicit char range for Turkish support. (Äž accepted as first char not to over complex)

This is a JavaScript port of the URL regex from http://stackoverflow.com/a/190405/384062 that includes a bug fix and some optimization. Mathias Bynens's Regenerate was used to convert unicode escapes. Bug fix: Eliminated stray | falsely allowing querystring to contain | ...

general purpose HTTP URL regex

Safe Password that allow only with a number, a lowercase, a uppercase, and a special character