1. Joomla SEO
EFSEO is a SEO extension for Joomla! with which you can control all important metadata manually and automatically. The handling of the metadata in Joomla! has never been so easy!
2. WordPress SEO
There are the two most famous WordPress SEO plugins.
All in One SEO Pack
The most downloaded plugin for WordPress (almost 30 million downloads). Use All in One SEO Pack to automatically optimize your site for Search Engines
All in One SEO Pack Optimizes your WordPress blog for SEO (Search Engine Optimization).
Improve your WordPress SEO: Write better content and have a fully optimized WordPress site using Yoast SEO plugin.
WordPress out of the box is already technically quite a good platform for SEO, this was true when Joost wrote his 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 Yoast 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. Yoast SEO forces you to choose a focus keyword when you're writing your articles, and then makes sure you use that focus keyword everywhere.
3. Magento SEO
Suite Ultimate embraces the best SEO practices and brings Magento SEO to a completely new level.
4. Drupal SEO
Improve your Drupal SEO: yhis module helps you optimize content around keywords in a natural, non-spam way.
5. Presta Shop SEO
Increase site traffic by landing on first page search engine results!
This SEO Expert module automatically fills in both meta tags and social media meta tags to optimize your online store for better visibility on search engines and social media platforms.
6. CMSMS SEO
Search Engine Optimization (SEO) shouldn't be the most important thing on your website; it is just a 'tool' to help you improve the website!
The first thing you have to do on your website is, of course, have well written (unique) content! If you haven't got anything interesting to say on your site, what will a visitor do? He (she) is going to the next one, somebody else's.
CMS Made Simple provides components (which can be used in combination with Smarty) to create a very accessible and search engine friendly website.
7. OpenCart SEO
OpenCart allows the use of search engine optimized URLs for product, category, manufacturer and information pages. SEO keywords are defined per product, category, manufacturer and information page, stored in a database table (url_alias), looked up at each page request, and translated into an internal URL.