http://drawpile.sourceforge.net/DrawPile is a sketching oriented drawing program with a twist: you can share your drawing live with other users.
\user\current\AppData\Local\drawpile\drawpile
HKEY_CURRENT_USER\Software\Drawpile\Drawpile\history
HKEY_CURRENT_USER\Software\Drawpile\Drawpile\input
HKEY_CURRENT_USER\Software\Drawpile\Drawpile\settings
HKEY_CURRENT_USER\Software\Drawpile\Drawpile\tools
HKEY_CURRENT_USER\Software\Drawpile\Drawpile\window
HKEY_CURRENT_USER\Software\Drawpile\Drawpile