Excalidraw
Virtual whiteboard for hand-drawn diagrams
Free124.9K
Laws of UX
a collection of the maxims and principles that designers can consider when building user interfaces. 
Design
About
a collection of the maxims and principles that designers can consider when building user interfaces. 
Alternatives to Laws of UX
MarkText
Next generation markdown editor, running on platforms of MacOS Windows and Linux. [![Open-Source Software][OSS Icon]](https://github.com/marktext/marktext) ![Freeware][Freeware Icon]
Open Source57.1K
Penpot
Open-source design and prototyping platform
Open Source49.4K
tldraw
Infinite canvas drawing tool
Free47.6K