Twitter being the hit phenomenon that it is, has spawned its own cottage industry of services and apps developed solely to maximize its use. Among them, is EmailTwitter. As the name suggests, EmailTwitter allows Twitterers to post and view tweets via an internet/email enabled mobile device without resulting in SMS fees. Users simply need to ship off an email to twitter@emailtwitter.com, including their Twitter username and password in the message subject header. To avoid having to send their Twitter log-in info with each update, users may also register securely on site. To retrieve friends' tweets or public tweets, users may simply send an email to timeline@emailtwitter.com and include the number of updates to be retrieved in the body of the email. Direct to friend(s) tweet support is also enabled.