Plugins are the scripts (Software components) to enhance or add the capabilities of such software applications (If supported in the software). Plug-ins are intended to modify the functionality of an application. They commonly used in the browsers to display videos, download files, view weather reports, synchronizing bookmarks and many more. They are also widely used now in the web applications for enhancement, optimization, SEO, Mailing lists and many more.
All in one SEO pack Out-of-the-box SEO for your WordPress blog. Automatically optimizes your WordPress blog for Search Engines (Search Engine Optimization). by Michael Torbert
W3 Total Cache fastest and most complete WordPress performance plugin. Dramatically improve site performance and user experience via caching: browser, page, object, database, minify and content delivery network support. Add browser, page, object and database caching as well as minify and content delivery network (CDN) to WordPress. By Frederick Townes.
Google XML Sitemaps with Multisite support: This plugin will generate a improved special XML sitemap which will help search engines to better index your blog. It can create sitemap for each your site and link it in robots.txt file. NOW WITH MULTISITE SUPPORT. By Mario Kostelac
Pie Register: Enhance your Registration Page. Add Custom Logo, Password Field, Invitation Codes, Disclaimer, Captcha Validation, Email Validation, User Moderation, Profile Fields, Charge User fees through Paypal and more. By Johnibo
Jetpack is a WordPress plugin that supercharges your self-hosted WordPress site with the awesome cloud power of WordPress.com. Supercharge your WordPress site with powerful features previously only available to WordPress.com users.
SEO Slugs: The SEO Slugs WordPress plugin removes common words like ‘a’, ‘the’, ‘in’, ‘what’, ‘can’ from post slugs to improve search engine optimization.For example, when you publish a post with a title like this: “What You Can Do Immediately For Higher Rankings”, WordPress automatically assigns a long filename to your post, called a post slug: /what-you-can-do-immediately-for-higher-ranking SEO Slugs plugin strips common words like “what”, “you” or “can” out of your post slug to make it more search engine friendly. With SEO Slugs plugin activated, the slug for our example blog post would look like this: /immediately-higher-rankings. The slug is generated on saving a post (so you get a chance to look at it before publishing, and change it), or on publish. It won’t overwrite an existing slug. You can force a new slug generation by deleting the existing one.
WPtouch automatically transforms your WordPress blog into an iPhone application-style theme, complete with ajax loading articles and effects, when viewed from iPhone, iPod touch, Android, Palm Pre, Samsung touch and BlackBerry Storm/Torch mobile devices.
Add Google +1 official button to your WordPress blog to let visitors recommend your pages right in Google search results without having to leave the page. Place anywhere on your template.By Onnay Okheng
NextGen Gallery is a full integrated Image Gallery plugin for WordPress with dozens of options and features including slideshow option. Before I started writing the plugin I studied all the existing image and gallery plugins for WordPress. Some of them are really good and well designed, but the gap I filled was a simple administration system at the back end which can also handle multiple galleries. By alexrabe
Post video players, slideshow albums, photo galleries and music / podcast playlist post your videos, photo galleries/flash slideshows easily and in seconds. One professional plugin for all your multi-media needs.
Handy Functions allows you to add and configure the functions that you would normally add to your
functions.php file, all in your WordPress backend.
Sexy Bookmarks menu to your posts, pages, index, or any combination of the three. Though the name may be a little “edgy” for some, SexyBookmarks has proven time and time again to be an extremely useful and successful tool in getting your readers to actually submit your articles to numerous social bookmarking sites. By shareaholic.
Simple Facebook Connect is a series of plugins that let you add any sort of Facebook Connect functionality you like to a WordPress blog. This lets you have an integrated site without a lot of coding, and still letting you customize it exactly the way you’d like. By Otto42