This is tool come free and you can use a paid version.
The paid version come with one price $25 more features : presets, a full color palette, layers, and export to PSD files.
This allows you unlimited freedom to sketch, create and save brushes, hot keys and shortcuts.
You can used with Windows 7/8 and Mac OS X.
I tested with Windows 10 and works great.
The output of your project is filename with the extension named .art .
The result of your work can be export like .pdf , .jpeg or .pds files.
The free version I don't see the copy paste option, but you can use export to save your drawing image.
This application come with few feature in the free version.
