The University of Maryland's Human-Computer Interaction Lab developed the Piccolo Java and .Net toolkit for 2D structured graphics and Zoomable User Interfaces (ZUIs).

"Piccolo is a layer built on top of a lower level graphics API. There are currently three versions of the toolkit: Piccolo.Java, Piccolo.NET and PocketPiccolo.NET (for the .NET Compact Framework). The java version is built on Java 2 and relies on the Java2D API to do its graphics rendering. The .NET version is built on the .NET Framework and relies on the GDI+ API to do its graphics rendering. This makes it easy for Java and C# programmers, even those targeting PDAs, to build their own animated graphical applications."

• License BSD
• Language Java, .Net, and .NET Compact Framework
• Platform Cross platform