There are hundred of content management systems in the market today, in 2016, the best rated were: WordPress, WebGUI, Drupal, Joomla, eZ Platform, MODX, concrete5, Composr, Magento and Squarespace. I have personally only had experience with 4 web design content management systems, WordPress, Wix, Weebly and Magento reviewed below.
Voted as one of the best content management systems in 2016, it is by far one of the most widely used platforms for web design. WordPress is the platform I have personally had the most development experience with. It is a very simple, dynamic and customisable platform. It requires basic understanding of HTML and CSS code to make changes to content, but shouldn’t be difficult to maintain with rudimentary knowledge of web development. The biggest flaw with WordPress is the sheer variety of templates and custom developments available online. You'd think more choice would be a benefit, however each developer has included their own user interface into the templates. This means that in order to get a more "user friendly" system to work with, you can download a template, but then when trying to customise it, you'll have to find all the settings again, and switching between templates means learning the user interface design. It can be very time consuming to develop a polished website, and is best left to the developers who know what they're doing.
Wix is far more user friendly without any requirement of knowing code at all. It's fairly cheap and allows for drag and drop customisation and pre-set elements and add-ins for an easily polished look that does a lot of the hard work for you. It has significant limitations however, particularly frustrating for a designer or developer unable to make small changes to the pre-set designs. It's a decent starting place for businesses who can easily move things around and make it look how they want without employing a developer. It does keep to itself in the sense that a wix site cannot be exported to another platform and there are limited add-ins. If you're trying to do something that wix doesn't do, too bad, because there's no room for custom development. It's also much harder to employ good SEO (Search Engine Optimising) techniques, as you cannot access the code, customise headers or tags on content or alternate text on images.
Quite similar to Wix as a user-friendly drag and drop design. Weebly however has a wider design spectrum allowing easier manipulation. Another positive feature in Weebly over Wix is the option to access and change the CSS (Cascading Style Sheet... The code) itself. In this way Weebly has the best of both worlds, and produces very polished, dynamic designs, with a flexible content to theme relationship that allows you to jump between themed template designs without losing content. It's slightly more expensive than Wix, but for $10 a month you can create a functioning and professional looking website quickly and easily, with the option to customise further if you have the skills. It's also a lot more SEO friendly that Wix. My website you're currently viewing was created in Weebly.
Magento is designed for online stores, it’s development functionality is quite different from the others, and is the least user friendly platform of the four in my opinion. It is not recommended for typical business information sites, or even sites with simple store requirements. Magento however is the obvious choice for complex ecommerce stores which require complicated carts and check out with coupons, specials, "try this" recommendations based on past purchases and complex store requirments. Most simply online stores could be created in WordPress or Weebly easily without any loss of functionality.