Excalidraw

Excalidraw is a free, open-source virtual whiteboard tool designed for collaborative diagramming and sketching. It offers a hand-drawn aesthetic, making it ideal for brainstorming, explaining concepts, and creating mockups. It is an alternative to Figma, Miro, and InVision, providing a simple and intuitive space for visual collaboration.

Key Features:

• Collaborative Real-time Editing: Multiple users can work on the same drawing simultaneously.
• Hand-drawn Style: Provides a unique, informal look to diagrams.
• Simple and Intuitive Interface: Easy to use with minimal learning curve.
• Export Options: Supports exporting to various formats, including PNG, SVG, and JSON.
• Customizable: Offers options to customize colors, fonts, and styles.
• Libraries: Allows creating and sharing custom element libraries.
• Offline Support: Works offline, enabling users to create and edit diagrams without an internet connection.
• End-to-end encryption: Provides secure collaboration.