Software
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Protégé is a free , open source ontology editor and knowledge-base framework. The Protégé platform supports two main ways of modeling ontologies via the Protégé-Frames and Protégé-OWL editors. Protégé ontologies can be exported into a variety of formats including RDF(S), OWL, and XML Schema.
The Protégé Ontology Editor and Knowledge Acquisition System
"Omni now makes the best GTD, task management, or life management applications across multiple platforms. However, OF for iPad is my favorite both in terms of user interface and functionality." Kenneth Rhee, Ph.D., ELOC Director
Thanks, Steve - The Omni Group
There's a lot of connections in your head, but unfortunately sometimes they don't last. With TheBrain, your digital Brain captures all that intelligence for playback just when you need it. With TheBrain you're never more than a few seconds away from any piece of digital information. Web pages, documents, images, notes... From people and projects to ideas and task lists, it's all there in an instant.
TheBrain :: Mind Mapping Software, Brainstorming, GTD and Knowledgebase Software