1. Google XML Sitemaps
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.
2. Google Analytics for WordPress
The Google Analytics for WordPress plugin allows you to track your blog easily and with lots of metadata.
Check out the Google Analytics for WordPress video:
Full list of features:
Simple installation through integration with Google Analytics API: authenticate, select the site you want to track and you’re done.
This plugin uses the asynchronous Google Analytics tracking code, the fastest and most reliable tracking code Google Analytics offers.
Option to manually place the tracking code in another location.
Automatic Google Analytics site speed tracking.
Outbound link & downloads tracking.
Configurable options to track outbound links either as pageviews.
Option to track just downloads as pageviews in Google Analytics.
Allows usage of custom variables in Google Analytics to track meta data on pages. Support for the following custom variables:
Single category and / or multiple categories
Post type (especially useful if you use custom post types)
Logged in users
Possibility to ignore any user level and up, so all editors and higher for instance.
WPtouch automatically transforms your WordPress website for mobile devices, complete with ajax loading articles and smooth effects when viewed from popular touch mobile devices like the iPhone, iPod touch, Android mobile phones, BlackBerry OS6+ mobile devices, and more!
The admin panel allows you to customize many aspects of its appearance, and deliver a fast, user-friendly and stylish version of your site to touch mobile visitors, without modifying a single bit of code (or affecting) your regular desktop theme.
4. Yet Another Related Posts Plugin
Yet Another Related Posts Plugin (YARPP) gives you a list of posts and/or pages related to the current entry, introducing the reader to other relevant content on your site.
Thumbnails: a beautiful new thumbnail display, for themes which use post thumbnails (featured images) New in YARPP 4!
Related posts, pages, and custom post types: Learn about CPT support.
Templating: The YARPP templating system gives you advanced control of how your results are displayed.
An advanced and versatile algorithm: Using a customizable algorithm considering post titles, content, tags, categories, and custom taxonomies, YARPP finds related content from across your site. Learn more.
Caching: YARPP is performant, caching related posts data as your site is visited.
Related posts in feeds: Display related posts in RSS feeds with custom display options.
Sociable Skyscraper is the ultimate advanced and feature-packed plugin for setting up a rating system on your WordPress blog. This plugin allows you to set up different rating systems for posts, pages and comments with a great degree of customization.
Sociable Skyscraper’s list of features is smart, extensive and ever-growing:
You can get even more Sociable with Sociable Skyscraper and: Rating and Review of: posts, pages, comments, Facebook, G+, LinkedIN, and Twitter. Multiple ratings for posts and pages. Latest tweets, latest posts, follows, and mentions. Visitor counter, visitors from Facebook and Twitter. As an added bonus, you also get an easy way to get to the TOP of the page or back HOME from Sociable Skyscraper.
And now the over 1.5 million WordPress Blogs with the Sociable Plugin can also use the Inbound.org icon. Inbound.org is a for-fun partnership of Rand from Moz and Dharmesh from HubSpot which offers community-curated marketing news. We like their idea so much and we hope you enjoy discovering and sharing great stuff from the inbound marketing fields of blogging, SEO, Social media, content marketing, conversion rate optimization, web analytics and more.
6. Google Translate Widget
Google Translate Widget aka GTranslate is a multilingual website solution for WordPress.
7. WP to Twitter
WP to Twitter automatically posts Tweets from WordPress to Twitter using your URL shortening service to provide a link back to your post from Twitter.
8. Broken Link Checker
This plugin will monitor your blog looking for broken links and let you know if any are found.
Monitors links in your posts, pages, comments, the blogroll, and custom fields (optional).
Detects links that don’t work, missing images and redirects.
Notifies you either via the Dashboard or by email.
Makes broken links display differently in posts (optional).
Prevents search engines from following broken links (optional).
You can search and filter links by URL, anchor text and so on.
Links can be edited directly from the plugin’s page, without manually updating each post.
WP-DB-Backup allows you easily to backup your core WordPress database tables. You may also backup other tables in the same database.
10. TinyMCE Advanced
This plugin adds 16 plugins to TinyMCE: Advanced HR, Advanced Image, Advanced Link, Advanced List, Context Menu, Emotions (Smilies), Date and Time, IESpell, Layer, Nonbreaking, Print, Search and Replace, Style, Table, Visual Characters and XHTML Extras.
Some of the features added by this plugin
Imports the CSS classes from the theme stylesheet and add them to a drop-down list.
Support for making and editing tables.
Editing in-line css styles.
Advanced list and image dialogs that offer a lot of options.
Search and Replace in the editor.
Support for XHTML specific tags and for (div based) layers.
Up your website’s social score with a little social Flare! Easily configure and share your blog posts across some of the most popular networks.
Flare allows you to:
NEW! Follow Me widget – place widgets on your site with links to your social networks to get more followers.
Configure multiple share icons for some of the most popular sharing services like Twitter, Facebook, Stumble Upon, Reddit, Google+ and Pinterest! More coming soon!
Easily order your icons, customize their icons’ appearance
Control which post types your Flare appears on
Display your Flare at the top, bottom, left or right sides of your post content
Flare displayed on the left and right of your post
12. AP Gravatars
A simple plugin that adds the gravatar photo associated with the user’s email to their profile page. If they do not have a gravatar account, it displays a link to create one. MultiSite compatable!
1. The CloudFlare plugin will also help you get the original IP address from visitors commenting on your site.
2. The ability to activate Development Mode from within the plugin.
3. IPv6 Detection.
14. Contact Form 7
It allows you to flexibly design the form and mail. You can manage multiple contact forms as well. In addition, it supports many features including AJAX submitting, CAPTCHA, Akismet spam filtering, file uploading, etc.
15. Growmap Anti Spambot Plugin
Very simple plugin that adds a client side generated checkbox to the comment form requesting that the user clicks it to prove they are not a spammer. Bots wont see it so their spam comment will be discarded.
16. In-Page Post List
Display a list of posts inside a page or a post.
Let your visitors share a post/page with others. Supports e-mail and posting to social bookmarking sites.
18. Wordfence Security
Wordfence Security – Anti-virus and Firewall security plugin for WordPress
19. WordPress SEO
The first true all-in-one SEO solution for WordPress, including on-page content analysis, and XML sitemaps.
20. WordPress SEO by Yoast