Querydog is a personal knowledge base. It's basically my bookmarking tool and information resource, so I can access it anywhere.
Vendelligence is a research support and filtering tool. It is an archived project that integrated with the Google Custom Search API as a Spring Boot web application.
VExSS is short for vendor expert support system. It grew out of implementation and application support scenarios I dealt with at several companies and personal knowledge base tools I had created over the years.