With our commitment to using standardised data models, SURROUND naturally uses, and promotes customers to use, lots of Open Source software too.
For customers wishing to start on a Semantic Web journey, we recommend model documentation, vocabulary management, data processing and data publication tools within the open, Python-based RDFlib family.
We also provide both consulting on the use of the core RDFlib library itself, and we also currently maintain RDFlib, so we can guarentee it responsiveness.
There are open source tools we have developed that build on RDFlib, for instance Cheka, our advanced data validator that can use hierarchical sets of data constraints.
Also, see our ChekaBox: an online, hosted, system that make Cheka easy to use with any RDF data.