AboutThisDay.com is a date based 'on this day in history' style search engine of facts like births and deaths of people, events and holidays. You can refine the results using year range and category filters and the results are sorted using a home-grown popularity algorithm
OntoWiki facilitates the visual presentation of a knowledge base as an information map, with different views on instance data. It enables intuitive authoring of semantic content, with an inline editing mode for editing RDF content, similar to WYSIWIG for text documents.
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