Bootstrap - Free HTML, CSS and JavaScript Framework

Bootstrap is a popular, open-source front-end framework for building responsive, mobile-first websites. It provides pre-designed components, a grid system, and utilities to simplify web development.

Features

• Responsive Grid System: A 12-column grid system for creating responsive layouts.
• Pre-Built Components: Includes buttons, modals, alerts, forms, and navigation menus.
• Customizable: Easy to override styles with Sass variables and custom CSS.
• Cross-Browser Compatibility: Ensures websites work consistently across modern browsers.
• Extensive Documentation: Provides detailed guides and examples for quick learning.
• JavaScript Plugins: Offers plugins for interactive elements like carousels and dropdowns.

Pros

• Speeds up development with reusable components and templates.
• Ensures mobile-first and responsive design by default.
• Supported by a large community and extensive third-party resources.
• Well-documented and easy for beginners to use.
• Completely free and open-source.

Cons

• Websites can look similar if heavily reliant on default styles.
• Requires additional customization for unique designs.
• Adds extra CSS and JS overhead, which might impact performance if not optimized.

Free Plan Details

Bootstrap is entirely free and open-source under the MIT License. All features are accessible without any restrictions or paid plans.