Bootstrap

Bootstrap is a free CSS open source front-end web framework used for designing websites and web applications. It contains a multitude of templates that can be used for typography, forms, buttons, navigation and other interface components.

Should read: In recent years, Bootstrap has become one of the most popular front-end frameworks used in web development.

Advantages

Bootstrap is adaptable and easy to use
The grid system is responsive, it adjusts itself depending on the device resolution of the client
It has access to the pre-styled components
Has many JavaScript plugins pre-developed and ready to be used by the developers
Bootstrap releases more updates than any other framework
Consistency - it has the same performance, independent of the platform
It can easily be integrated along with distinct other platforms and frameworks
Bootstrap has a very detailed documentation and a vast community who supports it

Disadvantages

Websites built using Angular tend to look the same
The files generated by Bootstrap are quite big (in terms of file size and number of code lines)
Upgrading Bootstrap can pose some issues, due to the number of frequent updates
Bootstrap has only one grid structure, which means that it's hard to create an original design

Components

Glyph icons
Dropdowns
Button groups
Button dropdowns
Input groups
Navs
Navbar
Breadcrumbs
Pagination
Labels
Badges
Jumbotron
Page header
Thumbnails
Alerts
Progress bars
Media object
List group
Panels
Wells

Development tools

Bootstrap Studio
Bootply
Jetstrap
Pingendo
Divshot
LayouIt
Brix.io

Versions

Bootstrap 1.0
Bootstrap 2.3
Bootstrap 3.0
Bootstrap 3.1
Bootstrap 3.2
Bootstrap 3.3
Bootstrap CSS 3.3.5
Bootstrap CSS 3.3.6