Visual Design Studios is the open source development identity of Rob Vesse
Rob Vesse has produced various open source projects over the years both independently and in conjunction with his employers at the time.
Airline is a Java library for building powerful command line application, it was forked from an inactive GitHub repository and is recommended by the original authors as one of two alternative successor projects.
JWT Servlet Auth is a set of libraries for adding JWT based authentication to Java Servlet applications in a generic and runtime agnostic way.
I have been involved in the Apache Jena project since 2011, becoming a commiter and PMC member. These days I don't get to contribute much code but am active on the mailing lists and GitHub issues/discussions.
dotNetRDF was my flagship open source project initially started as a solo project and eventually handed over to the wider community to maintain. It provides a comprehensive RDF and SPARQL API and toolkit for working with Semantic Web technologies in a .Net environment.