VogonWeb is a web-based platform for encoding your interpretations of texts. The annotation interface allows you to tag words or phrases with the concepts to which you believe they refer, and bring those tags together into relational statements that you believe are supported by the text. These tags and relations comprise the epistemic web: a network of texts, interpretations, and the people who create those interpretations. As we build the epistemic web we are producing not only a rich knowledge-base for the humanities, but also documenting the scholarly process itself.
API Documentation is here.
For deployment information, see this ansible role.