A set of standard graphic objects built into the Standard Widget Toolkit (SWT) from Eclipse, providing both new widget controls and an animation framework that share a common programming model with the existing controls in SWT.
The Napkin Look & Feel is a pluggable Java look and feel that looks like it was scrawled on a napkin. You can use it to make provisional work actually look provisional, or just for fun.
"F3 attempts to demonstrate that we're not exploiting the full capabilities of the Java platform for GUI development and that together with supporting tools like F3, the Java platform is highly competitive with or superior to competing GUI development."