Java GUI libraries only come with a handful of shapes. For example a rectangle, ellipse and line. A polygon is also a shape that's part of the libraries. Polygon is a general name for a shape with multiple edges. So in order to easily expand on the shapes that can be used in Java, I created a Polygon Creator. For somebody not into programming, this won't be of much use. The well-known Microsoft Paint is more artistic than this software. However, for somebody who's into (JavaFX) programming, this opens a world of new possibilities. It comes with new, save and load options. Also there are guiding shapes to help you place the points in the right position. You can drag all shapes around and right click the guiding shapes to adjust their properties. Click a polygon edge to add a point, right click a point to remove it and drag a point to move it.
I also wrote a library to create Polygon objects from the saved *.pgp files.
You can find the library in the "library" category (search for "Polygon").