Plugins, which are the tools to make the wordpress more functional and powerful. With the development of the wordpress, more and more plugins are developed. To improve your site or blog efficently, maybe you should use the following Must Use Plugins.
It is againt the comment spam for your WordPress blog and it is a Must Use Plugin.
It will back up your entire site including your database and all your files on a schedule that suits you.
3. Google XML Sitemaps
This plugin generates a XML-Sitemap compliant sitemap of your WordPress blog. This format is supported by Ask.com, Google, YAHOO and MSN Search. The SEO plugins listed above can also do the sitemap for you.
4. Platinum SEO Pack
It provide all the functions of All in One SEO Plugins, it can let you override any title and set any META description and META keyword.
5. Contact Form 7 It can manage multiple contact forms, plus you can customize the form and the mail contents flexibly with simple markup. The form supports Ajax-powered submitting, CAPTCHA, Akismet spam filtering and so on. 6. WP Super Cache This is a static caching plugin for WordPress. It generates html files that are served directly by Apache without processing comparatively heavy PHP scripts. By using this plugin you will speed up your WordPress blog significantly. 7. All In One WP Security & Firewall The All In One WordPress Security and Firewall is the ultimate security plugin that will make your WordPress site security. 8. Simple Tags Simple Tags Plugin lets you extend your WordPress tag functionality. It helps with Auto completion, Suggested Tags, Tag Cloud Widgets, Related Posts, Mass edit tags. 9.Google Analytics for WordPress This plugin makes it simple to add Google Analytics with extra search engines and automatic clickout and download tracking to your WordPress blog.