Frontend Web UI Framework Options

Twitter Bootstrap

Pros

• Comprehensive and solidly engineered.

Cons

• Class name changes between versions requiring refactoring
• Difficult to override styles to make a site not look derivative of Bootstrap

Foundation

Pros

• Lightweight
  Actually, I don't think this is true. It requires some time to install and configure. It also has a need to control the web project, and so doesn't exist easily with other technology (e.g. Django).
• Easy to apply a custom look to a site built with Foundation

Cons

• Reported to not be as well engineered as Bootstrap
• Relies on jQuery for many components (i.e. all you get is the grid if you want to use Angular)
• Non-trivial installation (for the Sass install)
• Doesn't exist easily with things like Django.
• A lot of prerequisites

Materialize

• Source

Pros

• Designed using Google's Material design principles
• Clear documentation
• Tuned performance in its JavaScript
• Focused set of features, i.e. not bloated

Semantic-UI

• Semantic UI website

Installation

$ npm install semantic-ui --save-dev

There are also Git repos for CSS and Less distributions.

Pros

• Feature complete compared to other frameworks.
• Inherent support for dimmers, flags, feeds, 3-dimensional cards

Cons

• Non-traditional CSS syntax

Skeleton

• Source

Pros

• Ultra lightweight.

UIKit

External links

• Delving Into UIKit (Sitepoint)

Notes

External links

• A Comparison of Responsive Web Frameworks in 2015 - CodeRed