Batik SVG Toolkit - The project's ambition is to give developers a set of core modules which can be used together or individually to support specific SVG solutions. Example modules are, SVG parsers, SVG generators and SVG DOM implementations. [Open Source, BSD-like] - http://xmlgraphics.apache.org/batik/
SVG Salamander - An SVG engine for Java that's designed to be small, fast, and allow programmers to use it with a minimum of fuss. [Open source, LGPL] - http://svgsalamander.dev.java.net/