Knoodl facilitates community-oriented development of OWL based ontologies and RDF knowledgebases. It also serves as a semantic technology platform, offering a JAVA service-based interface or a SPARQL-based interface so that communities can build their own semantic applications using their ontologies and knowledgebases.
Data Incubator is focussed on creating and publishing Linked Data, particularly where that data is converted from pre-existing sources. Its approach is to organise people around popular datasets to create mappings to RDF, write conversion code and publish the resulting data. The goal of each of these projects is to use the skill and experience of the community to develop the conversions so the original data provider can very simply adapt the work and emit the linked data themselves.