Semantic Topological Notes (SemToNotes) is a Topological Image Annotation and Image Retrieval System written in JavaScript. It is currently developed by the Institute of Humanities Computer Science at the University of Cologne as part of the DARIAH-DE Project (Phase II, March 2014 - February 2016).
Demo Applications: https://hkikoeln.github.io/SemToNotes
API Documentation: http://hkikoeln.github.io/SemToNotes/client/api/drawing/simple/index.html