While there are 33,550 plugins available out there which have been downloaded 744,581,225 times and counting, it is important to get those which are the best and most required and used WordPress plugin. To help you out in selecting the best one for your new or old WordPress blog, I have collected such plugins for you.
Members: Members is a plugin that extends your control over your blog. It’s a user, role, and content management plugin that were created to make WordPress a more powerful CMS.
s2Member Framework: s2Member — a powerful (free) membership plugin for WordPress. Protect members only content with roles/capabilities.
WP-Members: WP-Members is a free membership management framework for WordPress that restricts content to registered users.
Suggested Reading: 9 Premium WordPress Membership Plugins
Fast Secure Contact Form: Fast Secure Contact Form is a super customizable contact form that lets your visitors send you email. Blocks all automated spammers. No templates to mess with.
Contact Form 7: Contact Form 7 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.
VaultPress: VaultPress will take automated backups with easy restores with providing daily security scans with one-click repairs.
BackWPup: BackWPup plugin allows you to have a flexible, scheduled WordPress backup to any location.
Suggested Reading: 7 Best Free Backup Plug-ins For WordPress
Broken Link Checker / Redirection
Redirection: Redirection is a WordPress plugin to manage 301 redirections and keep track of 404 errors without requiring knowledge of Apache .htaccess files.
Broken Link Checker: Broken Link Checker will check your posts, comments and other content for broken links and missing images, and notify you if any are found.
WPtouch: WPtouch is a simple, powerful & elegant mobile solution for your website which will automatically transforms your WordPress website for mobile devices, complete with ajax loading articles and smooth effects.
Jetpack by WordPress.com: Jetpack is a WordPress plugin that supercharges your self-hosted WordPress site with the awesome cloud power of WordPress.com.
Related Content / Page Navigation
nrelate Related Content: nrelate Related Content plugin will display related content from your site, and/or your blogroll.
WP-PageNavi: WP-PageNavi plugins adds a more advanced paging navigation interface to your WordPress blog.
Askimet: Akismet filters out your comment and track-back spam for you. In short, the plugin will best guard against comment spam for your WordPress blog.
W3 Total Cache: W3 Total Cache is the fastest and most complete WordPress performance optimization plugin. It improves the user experience of your blog by improving your server performance, caching every aspect of your site, reducing the download time of your theme and providing transparent content delivery network (CDN) integration.
Suggested Reading: WP Super Cache Vs W3 Total Cache – Which One You Choose?
WP Super Cache: WP Super Cache will generate static html files from your dynamic WordPress blog. Once an html file is generated, your webserver will serve that file instead of processing the comparatively heavier and more expensive WordPress PHP scripts.
WP-Optimize: WP-Optimize are a simple but effective plugin allows you to clean up your WordPress database and optimize it without phpMyAdmin.
Social Media Optimization (SEO)
All in One SEO Pack: All in One SEO Pack plugin will automatically optimize your WordPress blog for Search Engines.
SEO Ultimate: The SEO Ultimate plugin will gives you a control over title tags, noindex, meta tags, Open Graph, slugs, canonical, autolinks, 404 errors, rich snippets.
Google XML Sitemaps: Google XML Sitemaps will generate a special XML sitemap which will help search engines to better index your blog.
WordPress SEO by Yoast: WordPress SEO by Yoast helps you optimize your pages content, images titles, meta descriptions and more to XML sitemaps, and loads of optimization options in between.
SEO Friendly Images: SEO Friendly Images automatically adds alt and title attributes to all your images improving traffic from search engines.
Digg Digg: Digg Digg will let you have an all in one social sharing plugin for your blog.
Sharebar: Sharebar adds a dynamic and fully customizable vertical box to the left of a blog post that contains links/buttons to popular social networking sites.
Sociable: Sociable is a free plugin which automatically add links to your favorite social bookmarking sites on your posts, pages as well as in your RSS feed.
ShareThis: ShareThis is a quick & easy sharing service that allows your users to share content – features Open Graph Sharing, Hovering Bar and CopyNShare.
Flare: Flare is a simple yet eye-catching social sharing bar that gets you followed and lets your content get shared via posts, pages, and media types.
Disqus Comment System: Disqus Comment System is a service and tool for web comments and discussions. Disqus makes commenting easier and more interactive, while connecting websites and commenters across a thriving discussion community.
LiveFyre: LiveFyre is a real-time commenting system which will be added with social login features.
Jigoshop: Jigoshop is a feature-packed eCommerce plugin built upon WordPress core functionality ensuring excellent performance and customizability.
WP e-Commerce: WP e-Commerce is a free WordPress Shopping Cart Plugin that lets customers buy your products, services and digital downloads online.