openCanvas 1.1
Because I promised my lovely students at Kuviskoulu to upload this here:
openCanvas 1.1 – Free drawing software
oC is an old-ish Japanese drawing software, and what makes it a lot of fun is that it’s free and you can draw real-time collaborations with your friends. Just download it, unzip and click on the file – it’s nice to have it on an USB stick for use at school or work too, since it doesn’t require any installing.
If the program’s showing strange characters, try changing its language like this: 
I’ll update, translate and upload my old Networking tutorial here later, stay tuned!