Cohere is an "idea management tool" that allows people to weave meaningful connections between ideas, for personal, team or social use.
Cohere has been developed as part of the Open University’s OpenLearn initiative, which is publishing thousands of hours of OU course materials online for free access and remixing, together with free e-learning and social software tools.
The Cohere Ontology
This is a lightweight ontology that models the argumentative relations between ideas at a high level of abstraction. The diagram below represents some of the entities and relations modeled through the ontology.