Excalidraw
Virtual whiteboard for hand-drawn diagrams
Free124.9K
Screenie
filter and search through images, change screenshot filetypes. 
Design
About
filter and search through images, change screenshot filetypes. 
Alternatives to Screenie
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