Platypus Wiki is an enhanced Wiki Wiki Web with ideas taken from Semantic Web. It offers a simple user interface for creating Wiki page plus metadata according to W3C standards. It uses RDF (Resource Description Framework), RDF Schema, and OWL (Web Ontology Language) to create ontologies and manage metadata.
OntoWiki is a semantic collaboration platform for the development of Semantic Web knowledge bases. OntoWiki enables large distributed communities to collaborate on a semantic level, by allowing users to contribute small structured knowledge pieces, which stitched together may result in comprehensive knowlegde bases. Powl is Web-based ontology authoring and management solution for the Semantic Web. Both expose an extensive API for PHP programmers.
COCANWIKI is a full-featured Wiki and content management system. It has many unique features not found in any other Wikis including live preview when editing, advanced navigation (including the ability to follow links in both directions), PIM/calendar extensions, user permissions, customisable page layouts, virtual hosting (handling more than one Wiki per server), search, anti-spam, and email notifications.
ConceptBase is a multi-user meta-database system based on a deductive object manager. It is mainly intended for conceptual modeling and coordination in design environments. The system implements O-Telos, a dialect of Telos that amalgamates properties of deductive and object-oriented languages.
Karra is a flexible, Web-based, multi-lingual system for creating digital libraries of images, documents, URLs, and associated metadata. It could be used to archive and organise an organisation’s photo collection, providing a historical record. It could be used in scientific study where images of particular items need to be stored with data or geographical information. Textual information can be included with each item, creating a valuable repository of data and providing a way to search for records later.