In what ways is this more useful than the Google Drawings already in Google Drive? Google drawings lets you:
* Edit drawings online in real time with anyone you choose, and invite others to view your edits in real time.
* Chat with others who are editing your drawing, from within the drawings editor.
* Publish drawings online to the world as images, or download them in standard formats.
* Insert text, shapes, arrows, scribbles, and images from your hard drive or from the Web.
* Lay out drawings precisely with alignment guides, snap to grid, and auto distribution.
* Insert drawings into other Google documents, spreadsheets, or presentations using the web clipboard, then tweak them inline.
Why would I use Jotleaf instead?