Excalidraw
Virtual whiteboard for hand-drawn diagrams
Free124.9K
Wireframe.cc
a simple wireframing tool that doesn't get in your way. 
Design
About
a simple wireframing tool that doesn't get in your way. 
Alternatives to Wireframe.cc
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