OpenCyc is described as 'Cut-down open version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine. Cycorp, the builders of Cyc, have set up an independent organization, OpenCyc' and is an app. There are three alternatives to OpenCyc for a variety of platforms, including Web-based, Java Mobile, Flathub, PortableApps.com and Mac apps. The best OpenCyc alternative is Wikidata, which is both free and Open Source. Other great apps like OpenCyc are YAGO and SWI Prolog.
Wikidata is a free and open knowledge base that can be read and edited by both humans and machines.
Wikidata is the most popular Web-based alternative to OpenCyc.
Wikidata is the most popular Open Source & free alternative to OpenCyc.
YAGO2s is a huge semantic knowledge base, derived from Wikipedia WordNet and GeoNames. Currently, YAGO2s has knowledge of more than 10 million entities (like persons, organizations, cities, etc.) and contains more than 120 million facts about these entities.
SWI-Prolog offers a comprehensive Free Software Prolog environment for programming software that does logical reasoning. Together with its graphics toolkit XPCE, its development started in 1987 and has been driven by the needs for real-world applications.
SWI Prolog is the most popular Windows, Mac & Linux alternative to OpenCyc.
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