Many features in Semantic UI uses Javascript customization such as for Modal. This is unlike Bootstrap that can add Modal just with customizing the HTML attributes. Developers who plan to using Semantic UI must be familiar with Javascript or JQuery to get the most out of it.
The whole Semantic-UI package is well organized, with every component neatly set up with it's own stylesheet and JavaScript file. This way you can load only the components you need for each page, minimizing the load time and file size.
Packages are bigger when comparing to Twitter Bootstrap or Zurb Foundation. Semantic UI is really extremely large and it would be better to use specific modules and components, rather than the whole thing.
While the styling and components parts of Semantic UI are well-made and eye-catching, the logic and JavaScript part needs some work.
Many features are bugged or behave in unexpected ways. Some aren't optimized to work with all devices. For example, the navigational menu in the Semantic UI website is often laggy when viewed through a mobile device.
It includes tons of UI components that you may need for almost any type of project you may work on. And of course, you can always only pick what you need.
Foundation was one of the first frameworks to adopt a mobile-first philosophy. By focusing on mobile design first, Foundation makes designers think on what kind of content is important, relevant and interesting to the users without thinking too much on the space.
Just by looking at the name, Foundation merely provides designers with a foundation of sorts on which they can build their design. It can be customized easily through SASS, a powerful CSS pre-processor or by overriding the default CSS styles.
Foundation uses REMs instead of pixels, meaning you don't have to state an explicit height, width, padding, etc, for every device. Simply put, using REMs means you can just state font-size: 80%; and have the whole component (and its nested elements) shrink by 20%.
This is great for making your site mobile friendly. There is also a Sass function in Zurb that converts pixels to REMs so if you're used to thinking in pixels, you don't have to learn a different system.
Foundation has a feature called block grid. Block grid gives designers the power to divide the contents of an unordered list into a grid that is evenly spaced. Furthermore, Foundation also takes care of collapsing columns as well as removing gutters.
Since Foundation is built to be customizable, it's default style may not be very appealing for most. While it's true that most production-ready websites shouldn't be using the default style of a css framework (they would all end up looking the same), this is even more true for Foundation.
There's a variety of front-end templates, icon fonts, responsive table examples, SVG icons and stencils that help you quick-start or easily improve on your site.
Foundation comes with Interchange, it makes use of media queries to load images responsively and create content that's suited to different browsers and devices.
Material design is very opinionated on how design elements should behave and look. The basics of which revolve around certain visual elements (physics, space, momentum and light) which are used to create specific UX elements.
This is very helpful because it creates a consistent feel without making every design look the same. This can be seen in Materialize too, where each element may be customized but still it keeps the consistent look of the material design.
Since Materialize follows Google's guidelines for Material design, which in theory is device agnostic, Materialize itself is device agnostic too. It's designed to look good on every device.
While the default style is not bad at all, Materialize also gives developers the ability to customize it and fit their own style, while still keeping in line with the Material Design philosophy.
Along with the CSS files, designers can also download the SASS files which can be edited and compiled.
Every aspect of the framework is designed to be modular, this way designers can easily choose which components to add to their stylesheet without risking to damage the overall style.
UiKit is not a very popular framework, especially compared to other options. As such it may be hard to find learning resources other than the official documentation or it may be more likely for development of UiKit to be dropped than for another more popular framework.
Modernizr checks browser support for html5, css3, as well as a few other miscellaneous elements and allows for easily writing fallbacks if they're not supported.
With optional support for XHR, we can use techniques such as XHR eval and XHR injections to optimize the loading of external scripts and significantly reduce page load times. Alongside XHR, built-in support for Flash means that you can use your old swf/flash content on your website, where you feel you're not ready for HTML5 yet.
HTML5 Boilerplate theme doesn't only provide a base template for building your next modern site. It also has performance optimization features built into it which include stuff like html + js minification , image size reduction as well as css minification. This link here describes how to optimize your shiny new html5 site using these built in features.
To help out newcommers to either programming in general or HTML5 Boilerplate specifically, the boilerplate includes in-depth docs that help understand how things work and why certain choices are made. The documentation is highly comprehensive going even as far as to describe every single line of normalize.css that the H5BP includes.
HTML5 Boilerplate is basically just that, a template or a basis on which to build an HTML page. It doesn't have much mark up or components out of the box. In other words, it doesn't provide all the components and tools needed to build a UI, it contains best practices and a generall template on which to build your UI.
Loading splash screens, non-changing URLs because everything's loaded by JS, awful HTML generation from the PHP scripts. It's just a trash fire of bad.
Meshki is a CSS library and somewhat barebones, it provides stylized basic blocks to create webpages and it lacks complex widgets CSS frameworks provide.