This is an image editor that can be integrated in a web application.
The drawing tools and GUI can be customized for specific needs,
for example:

The developer can decide which tools, colors, strokes, or patterns
are available and arrange panels and controls in preferred order;
define custom buttons to select a drawing tool, color, and style
by single click.

The editor allows drawing over background images, supports
transparent images, translucent colors. Users can insert cliparts
provided on the page or from their computers (using drag and drop).

The image can be loaded in PNG, GIF, JPEG formats and saved
on the server in PNG or JPEG formats. The image can be saved
in its original size or scaled (e.g. to produce a thumbnail).

The editor is implemented in HTML5 Canvas, JavaScript and
compatible with all major desktop and mobile browsers,
no dependency on plugins, 3rd party libraries, or frameworks.