Sanssouci (French "without cares") is the former summer palace of Frederick the Great, King of Prussia at Potsdam, just outside Berlin. It is often counted among the German rivals of Versailles. While Sanssouci is in the more intimate Rococo style and is far smaller than its French Baroque counterpart, it is notable for the numerous temples and follies in Sanssouci Park.

Sanssouci is a Java framework for auto-generating fancy Swing GUIs via introspection that display objects directly to the user. The core idea is based on a book and implementation of a quite similar framework called "Naked Objects", but it is a complete clean-room implementation with a Swing-based interface and Java2 compatibility.