Excalidraw
Virtual whiteboard for hand-drawn diagrams
Free124.9K
Heatly
free heatmap tools to understand the website's user experience better. 
Design
About
free heatmap tools to understand the website's user experience better. 
Alternatives to Heatly
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