icyleaf

You coult post message to your Twitter and show it.
<h3>Useage</h3>
Terminology Agreement 
1. LoginForm: Log in to Blog filled out a user name and password form. 
2. TwitterForm: Send Twitter message form. 
3. TweetForm: Show Twitter messages from.
Add below code to the theme where you would like it your user to twitter from:
The best place to put it would be in your theme’s index.php file right above 
And WSTS_ShowTwitter() function can be used it with parameter! Parameter Usage:
if using it without parameter, then it did’t show LoginForm before log in to your blog. 
Also, using codes that it will show TweetForm.
Notice: 
Make sure Don’t using this plugins together with the other twitter api apps.
<h3>History</h3>
<h3>Credits</h3>
This plugin was inspired from the WS Audio Plauer plugin by: 
icyleaf (http://www.icyleaf.cn)

Twitter Swell

You coult post message to your Twitter and show it.

Ishimwe

This plugin acts as a quick front-end posting tool, allowing your visitors to easily submit posts and images from the front-end of your site, via a sidebar widget form, or a custom shortcode in a page or post of your choice. 
This is a very easy way to get your visitors to engage on your website. The idea came from a client who wanted a way to let members of their congregation post articles in the main church’s website 
Some of the niches this plugin can be useful include:
<ul>
<li>Blogging website with many contributors</li>
<li>Community webstes with user participation/interativity</li>
<li>Forum like websites that don’t want to use a fully featured forum module/plugin</li>
<li>Classified ads website where users post and review others’ posts</li>
</ul>
and more
This plugin is fully localizable with .po file included. The .mo for French is included
You can join/follow the discussion about the plugin on its home page at http://www.codiiv.com/forums/forum/plugins/sidebar-post/
<ul>
<li>Twitter: https://twitter.com/codiiv</li>
<li>Facebook: https://www.facebook.com/codiiv.com</li>
<li>Github: https://github.com/codiiv</li>
</ul>

Sidebar Posting

This plugin allows your visitors (logged in OR Not) to submit posts to your site via a simple sidebar widget form.

Twitter Swell vs Sidebar Posting