TweetPack is a small module that provides useful blocks for twitter users as well as leverages the Twitter Web Intents service.
You can elect to include the Twitter Widgets library on all pages to use throughout your site.
You can read more about Twitter Web Intents here: https://dev.twitter.com/docs/intents
Twitter Button - Generates buttons dynamically for following supplied user or sharing.
TweetStream - Provide stream of Users tweets, Favorites, List, or Hashtag search. - SImply provide the widget id.
How to link to a twitter profile from your content:
<a href="https://twitter.com/intent/user?screen_name=mrtheme">@mrtheme</a> is my twitter username!