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A Wonderful Hand Drawn Sketch for Designer and Developer

Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Stars: 32.8k
Platforms: Windows, Linux, macOS
License: MIT
Languages: TypeScript(90.4%), JavaScript(4.8%)
Link: https://github.com/excalidraw/excalidraw
There are many important features that made Excalidraw great at being a virtual whiteboard for sketching hand-drawn like diagrams.
Shape libraries
You can find a growing list of libraries containing assets for your drawings at libraries.excalidraw.com.

Charts
You can copy any two-column dataset from a spreadsheet, or comma separated values (CSV) from a text file, and paste them into Excalidraw to quickly produce a chart.

Your data is encrypted
Many of Excalidraw use cases involve drawing sensitive data. As such, Excalidraw use end-to-end encryption to protect your private data.

Collaboration
Live collaboration could be used for interviews, brainstorming, presentations, and more.
In order to create a session manually, you just need to generate a link of this form:
https://excalidraw.com/#room=[0-9a-f]{20},[a-zA-Z0-9_-]{22}
The first set of digits is the room. This is visible from the server that’s going to dispatch messages to everyone that knows this number.
The second set of digits is the encryption key. The Excalidraw server doesn’t know about it. This is what all the participants use to encrypt/decrypt the messages.
Save as image
You can easily save your creations in image formats, such as png and svg.
