Auto-hyperlink text URLs in post content and comment text to the URL they reference. Doesn’t try to hyperlink already hyperlinked URLs. Improves upon WordPress's default make_clickable function, along with adding some configuration options (such as link truncation).
This plugin will recognize any protocol-specified URI (http|https|ftp|news)://, etc, as well as e-mail addresses. It also adds the new ability to recognize Class B domain references (i.e. "somesite.net" where not just those prepended with "www.") as valid links (i.e. "wordpress.org" would now get auto-hyperlinked).