Excalidraw
Virtual whiteboard for hand-drawn diagrams
Free124.9K
Mobbin
browse mobile design patterns for popular apps. Explore common user flows such as onboarding, account sign up and log in, core functionality, and more. 
Alternatives to Mobbin
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