Twitter Bootstrap is a great front-end framework that lets you quickly prototype new web projects. Here is a list of great resources that gives even more power to the Bootstrap framework.
Metrostrap – Bootstrap skin
Metrostrap is a bootstrap minimalist (metro-like) skin that gives you a solid base to start your projects.
This library allows you to create editable elements on your page. It can be used with any engine (bootstrap, jquery-ui, jquery only) and includes both popup and inline modes. It’s new life of bootstrap-editable plugin that was strongly refactored and improved.
Please try out demo to see how it works.
Extends Bootstrap’s native modals to provide additional functionality. Introduces a ModalManager class that operates behind the scenes to handle multiple modals by listening on their events.
Bootswatch is a collection of free themes for Twitter Bootstrap.
Free Twitter Bootstrap UI Mockup Templates for Keynote, PowerPoint and OpenOffice
Prototype Bootstrap-based apps using your favorite presentation tool. The following vector UI components have been designed from scratch in Apple Keynote, Microsoft PowerPoint and OpenOffice Impress, and are fully editable and customizable without needing any additional design tools.
A date range picker for Twitter Bootstrap
This date range picker component for Twitter Bootstrap creates a dropdown menu from which a user can select a range of dates. It was created for the reporting UI at Improvely.
The iconic font designed for use with Twitter Bootstrap.
Twitter Bootstrap Button Generator
The easiest way how to set up your buttons based on Twitter Bootstrap in a seconds.
Grid displayer for Twitter Bootstrap and Foundation
In-browser web design made easier with this bookmarklet which displays the grid of your favourite front-end framework.
Jetstrap is a 100% web-based interface building tool for Twitter Bootstrap.
Beautiful Buttons for Twitter Bootstrappers
This is an extension to the Twitter Bootstrap framework. It makes creating pretty buttons easy.
jQuery UI Bootstrap
This is a great Goodie item for you in reference to Bootstrap. jQuery UI is a great library of interface elements and it includes all the widgets you can ask for.
Bootstrap-based mockup interface builder for Web apps.