PatternPack makes it easy to create and maintain pattern libraries. It's a static site generator that lets you document your UI using Markdown and just one grunt task.
Summernote is a simple WYSIWYG editor built on Bootstrap. It's easy to install and customize, and integrates with any back-end technology.
Some fonts carry a lot of weight. In the case of the gorgeous sans-serif font family Libertad, that's actually 14 different weights! With this Mighty Deal, you'll get ...
Rome is a customizable date and time picker. It has an opt-in UI and doesn't require jQuery.
Supersonic is a UI framework that lets you build data-driven apps that have native performance. Everything is there for hybrid app development right out of the gate.
O-grid is a grid system built just for responsive layouts. It's based on twelve columns and four different layouts, dependent on viewport size.
Ply is a modal/dialog system that offers a number of options and customizations. You can use it for alerts, confirmations, forms, multi-step dialogs, and more.
Haystack is modular search for Django. It lets you write your search code once and then choose the search engine you want to run it on.
Formstone is a set of thoughtfully crafted front-end components, rather than a traditional framework. It's responsive, lightweight, modular, and automated.