W3 Total Cache is the most complete WordPress caching plugin. It can improve your website performance by caching the pages, and objects, and minifying the databases by content delivery network support.All In One SEO Pack
This plugin helps to make WordPress fully Search Engine Optimized without digging deep into SEO. It provides almost every function needed in just a single page.
Google XML Sitemaps
This Google XML Sitemaps plugin generates XML sitemaps for your WordPress blog, so it is easy for crawlers like Google and Bing, to index your site.
Akismet is possibly the best way to protect your website from web spam. Akismet filters comments and trackback spam, so that you can focus on managing other important things. It runs on autopilot and provides 24-hour protection.
AddThis allows your user to share your content at 330 of the most popular bookmarking and social networking sites including Facebook, Twitter, Digg, Reddit, StumbleUpon and many more.
The ShareThis plugin allows the sharing of content from your site through email and 50 different social networks including Facebook, Twitter, Digg, Reddit, and many more. This plugin also has Facebook ‘Like’ button capability and the Google +1 button for easy sharing of articles (like this one!)
This plugin allows you to repair, backup and restore your databases. It also supports automatic scheduling of backups and optimization.
Contact Form 7
The Contact Form 7 plugin is a simple and flexible plugin that you can use to manage multiple forms, customize and mail its contents. It can also be punched with Akismet of CAPTCHA for spam filtering and so on.
The recommendations provided in this article will get you started with a solid Content Management System (CMS) foundation, great features and functionality and data protection for your business and users. You should know that there are many WordPress plugins available for free, on the WordPress site. The plug-ins you select will be dictated by your own business and technical needs and by the needs of your customers and users. Take the time to browse the list and choose those that are the most suitable for your needs.