Welcome back to Tech18.com,  as you all know what is twitter and why are we using it. So lets not waste our time by knowing what it is, Here are a list of 21 plugins which are compatible with Wordpress 2.7 :

1. Wordpress  Twitter Bot -It is a tool which will post a tweet when you have created a new post on your Wordpress blog and when you have updated a post. It can be turned on and off on a per-post basis.
2. Twitter for Wordpress – This tool “Twitter for WordPress” displays yours latest tweets in your WordPress blog.
3. WP to Twitter – This WP-to-Twitter plugin posts a Twitter status update from your blog using the Cli.gs URL shortening service to provide a link back to your post from Twitter.
4. Top Twitter Links by Twitturls -This widget displays currently popular links that have been tweeted.
5. Twitter- This Twitter Widget displays your tweets on your sidebar. There’s lots of switches to turn on/off what you want to display.
6. Twitter Link- This plugin Converts @username mentions in posts and pages into links to Twitter.
7. WP My Twitter- This WP My Twitter will display your recent Twitter Tweets. Works in your theme, with shortcode, or as a Widget.
8. Twitter Post- Twitter Post is a plugin which enables the users to send automatic messages for twitter account, always when the user publish one post.
9. Automagic Twitter Profile URI- This plugin adds a Twitter profile link to your commenters: If they have a Twitter profile, a link to it is “magically” added to their name in the comments.
10. Twitter It!- With this plugin an user has the ability to twitter a article that he is your site. This plugin is easy to install highly customizable. Caching of short-urls included.
11. Add Twitter Link to Comments- This is a plugin that adds a twitter link to comments if the comment author uses an email connected to a twitter account.
12. Twitter ReTweet- This plugin  provides a function that displays a ReTweet link which gives visitors the ability to ReTweet the current post; supports custom URLs (perfect for Google Analytics Campaign Tracking).
13. Comment Tweets- This plugin will allow the users to follow up on the comment and expand the conversation from your twitter account  if desired.
14. TwiBadge- This is a WordPress plugin to show your Twitter badge as a widget with easy personalization.
15. FishyTweet- Adds a TinyURL link to each post that points the user to Twitter.com.
16. TweetRoll- A smart badge that shows your Twitter details and who you’re following on Twitter. It shows your friends’ avatars and invites your readers to come and follow you too.
17. NewsTweet- NewsTweet constantly pulls twitter posts containing that word or phrase which you have set or chosen.
18. Tweet-rank- This plugin Integrates  follower graph in your sidebar to display changes of the number of your followers you have on Twitter.
19. TweetMe- TweetMe is a simple Wordpress Plugin that posts a tweet to Twitter when you publish a blog post.
20. Twitbar- A twitter widget that adds the code needed to create a Twitter sidebar.
21. Tweetbacks- People are talking about your posts, and not only in the comments to your post. A lot of that conversation is happening on Twitter, and now, you can take that conversation right back to your blog! This plugin imports those tweets about your posts as comments. You can display them in between the other comments on your blog, or display them separately.

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