Best free plugins for WordPress
WordPress SEO by Yoast
Improve your WordPress SEO: Write better content and have a fully optimized WordPress site using Yoast’s WordPress SEO plugin.
WordPress out of the box is already technically quite a good platform for SEO, this was true when I wrote my original WordPress SEO article in 2008 (and updated every few months) and it’s still true today, but that doesn’t mean you can’t improve it further! This plugin is written from the ground up by Joost de Valk and his team at Yoast to improve your site’s SEO on all needed aspects. While this WordPress SEO plugin goes the extra mile to take care of all the technical optimization, more on that below, it first and foremost helps you write better content. WordPress SEO forces you to choose a focus keyword when you’re writing your articles, and then makes sure you use that focus keyword everywhere.
W3 Total Cache
Easy Web Performance Optimization (WPO) using caching: browser, page, object, database, minify and content delivery network support.
The only WordPress Performance Optimization (WPO) framework; designed to improve user experience and page speed.
Recommended by web hosts like: Page.ly, Synthesis, DreamHost, MediaTemple, Go Daddy, Host Gator and countless more.
Trusted by countless companies like: AT&T, stevesouders.com, mattcutts.com, mashable.com, smashingmagazine.com, makeuseof.com, yoast.com, kiss925.com, pearsonified.com, lockergnome.com, johnchow.com, ilovetypography.com, webdesignerdepot.com, css-tricks.com and tens of thousands of others.
W3 Total Cache improves the user experience of your site by increasing server performance, reducing the download times and providing transparent content delivery network (CDN) integration.
Enables the advanced features of TinyMCE, the WordPress WYSIWYG editor.
This plugin will let you add, remove and arrange the buttons that are shown on the Visual Editor toolbar. It includes 15 plugins for TinyMCE that are automatically enabled or disabled depending on what buttons are chosen.
iThemes Security (formerly Better WP Security)
The easiest, most effective way to secure WordPress in seconds.
iThemes Security (formerly Better WP Security) gives you over 30+ ways to secure and protect your WordPress site. On average, 30,000 new websites are hacked each day. WordPress sites can be an easy target for attacks because of plugin vulnerabilities, weak passwords and obsolete software.
Google XML Sitemaps
This plugin will generate a special XML sitemap which will help search engines to better index your blog.
This plugin will generate a special XML sitemap which will help search engines like Google, Bing, Yahoo and Ask.com to better index your blog. With such a sitemap, it’s much easier for the crawlers to see the complete structure of your site and retrieve it more efficiently. The plugin supports all kinds of WordPress generated pages as well as custom URLs. Additionally it notifies all major search engines every time you create a post about the new content.
WP Maintenance Mode
Adds a splash page to your site that lets visitors know your site is down for maintenance. It’s perfect for a coming soon page.
Add a maintenance page to your blog that lets visitors know your blog is down for maintenance, or add a coming soon page for a new website. User with admin rights gets full access to the blog including the front end.
Activate the plugin and your blog is in maintenance-mode, works and only registered users with enough rights can see the front end. You can use a date with a countdown timer for visitor information or set a value and unit for information. Also works with WordPress Multisite installs (each blog from the network has it’s own maintenance settings).