Twitter Tools

Twitter Tools is a plugin that creates a complete integration between your WordPress blog and your Twitter account.

1. Download the plugin archive and expand it (you've likely already done this).
2. Put the 'twitter-tools' directory into your wp-content/plugins/ directory.
3. Go to the Plugins page in your WordPress Administration area and click 'Activate' for Twitter Tools.
4. Go to the Twitter Tools Options page (Settings > Twitter Tools) to set your Twitter account information and preferences.

To download this plugins follow this links Twitter Tools 

All in One SEO Pack (wordpress plugins)

Some features:

• Advanced Canonical URLs
• Fine tune Page Navigational Links
• Built-in API so other plugins/themes can access and extend functionality
• ONLY plugin to provide SEO Integration for WP e-Commerce sites
• Nonce Security
• Support for CMS-style WordPress installations
• Automatically optimizes your titles for search engines
• Generates META tags automatically
• Avoids the typical duplicate content found on Wordpress blogs
• For beginners, you don't even have to look at the options, it works out-of-the-box. Just install.
• For advanced users, you can fine-tune everything
• You can override any title and set any META description and any META keywords you want.
• Backward-Compatibility with many other plugins, like Auto Meta, Ultimate Tag Warrior and others.

If upgrading, please back up your database first!
You can download the Plugins follow this links All in One SEO pack