I should have made a thread here a while ago!
Doodl is a little program I wrote that lets you draw little doodles and upload them. You can also edit other people's doodles and upload them as edits. Unlike other drawing programs, Doodl saves all the vector data of every stroke you put on the canvas. That data gets uploaded alongside the image and downloaded when you edit someone else's doodle. So for example you could draw something and someone else could cleanly erase parts of or entire lines very easily.
The download is here: https://www.dropbox.com/s/nfcecqmbmpcpqyq/Doodl.exe?dl=0
It's also open source: https://github.com/emptyaudio/doodl
Here's a little thing I did in the general. Once you have Doodl downloaded, run it once then you can click on the edit button and add your own edit to this starter image.https://doodl.blob.core.windows.net/2016-07-10/CcTL2A+ngUCdPUMs68QNCg
I'm planning on integrating with Discord and Skype at some point so you can send doodles to channels and groups without having to paste a link yourself. Doodles show thumbnails in both clients already for quick previews. If there's interest, I might also make it so you can post to the sub or to the general itself.