Software libraries that import and export SBOL version 1.1 files are freely available at the SynBioDex site on GitHub under the Apache 2.0 license. Libraries are implemented in both Java and C. In addition, Python wrappers for the C library are available. Both libraries are under active development, and the version 2 prototypes are expected in spring 2014.
If you would like to hack on the Java source, please read our GitHub guide. It should cover everything you need to get started or to contribute back to the project. The code is built using Maven. If you are unfamiliar with it, see our Maven guide.
For further information about the libSBOL library, its implementation, or its usage, please feel free to contact the libSBOL developers.