Best Twitter Applications To Use on a Blog or Website

Add Tweets
Make Twitter Update Widgets for site or blog using javascript

Twitterfeed
Post your blog to Twitter through your RSS feed

Feed Tweeter
integrate Twitter with Plurk, your blog and delicious

Twitter Counter
Display your follower count on your site or blog.

Twit This
Add this option so people can easily tweet information from your site or blog

Twitter Tools
A wordpress plugin that lets you integrate Twitter with your blog. You can send your updates to your blog as well as create tweets directly from your blog

Twitter for Wordpress
displays latest tweets on your blog

Loudtwitter
Ships your tweets to your blog

Twitter Sharts
‘Shart’ your twitter status anywhere within your wordpress blog posts or pages

Twitt Twoo
plugin that will allow you to update your Twitter status right from your blog’s sidebar.

Twitter Updater
automatically sends a Twitter status update to your Twitter account when you create, publish, or edit your WordPress post

Twitter Wordpress Sidebar Widget
a wordpress widget where you can send your tweets to your blog

WordTwit
a plugin that utilizes the Twitter API to automatically push a post to your Twitter account when it is first published.

Comment Twitter SMS Notification
plug in to be notified by SMS when a user post a new comment on your blog.

Stammy’s RSS To Twitter
Not too many people have access to a Ruby-enabled server so the author decided to make a simple PHP script to get the job done.

PingTwitter
automatically update your Twitter Account when you publish a new blog post

Check out twitterapps for all the links and much much more