getbootstrap.com/
Bootstrap
Bootstrap is free. A CSS toolkit with a grid, buttons, forms, and navbars ready to use.
What is Bootstrap?
Bootstrap is free. Bootstrap ships styled components and a layout grid. You drop in the markup from the docs and get a working page without designing a system first.
Bootstrap is a tool in the Frameworks category of a tech stack.
Level
Key Features
Responsive gridStyled componentsUtility classes
Bootstrap Pros & Cons
Pros of Bootstrap
A full layout is possible from the docs alone
The class names are widely known
Works with plain HTML, React, or Angular
Cons of Bootstrap
The default theme is recognizable
Customizing it deeply means fighting the theme