Flutter is an open-source UI toolkit created by Google for building natively compiled applications from a single codebase. It supports mobile, web, and desktop platforms, offering a fast development cycle and highly customizable user interfaces. Flutter's rich set of pre-designed widgets and tools make it ideal for developing beautiful, responsive, and high-performance apps.

Features of Flutter:

• Build natively compiled applications for mobile, web, and desktop from a single codebase.
• Rich set of pre-designed widgets for creating expressive UIs.
• Hot reload feature for fast development iterations.
• Customizable UI components and themes for platform-specific look and feel.
• High performance with direct access to platform APIs.
• Cross-platform support with minimal code duplication.
• Strong developer community and extensive documentation for guidance.

To check version: $ flutter --version

Disclaimer: Flutter is an open-source project maintained by Google and the community. It is distributed under an open-source license and is provided "as is," without any warranty, express or implied. Users are encouraged to review the licensing terms and comply with applicable regulations when using Flutter.