Symbolab is a semantic web search engine for math and science. It allows users to search for equations, formulas and expressions using mathematical symbols and scientific notations as well as full text search. The stated goal of the site is to provide the most relevant search results that are theoretically and semantically similar, rather than visually.
"Semantic Content Engine
The word ontology has many definitions, but for content management and computer science, Wikipedia refers to it as: "a model for describing the world that consists of a set of types, properties, and relationship types.""
"The Sigma knowledge engineering environment is an system for developing, viewing and debugging theories in first order logic. It works with Knowledge Interchange Format (KIF) and is optimized for the Suggested Upper Merged Ontology (SUMO)."
Discovery hub is an exploratory search engine which helps you to discover things you might like or be interested in. It widens your cultural and knowledge horizons by revealing and explaining unattended information. Based on Wikipedia data, Discovery Hub is cross-domain and works on numerous topics including music, cinema, literature but also politics, automobile and much more. It allows performing queries in an innovative way and helps you to navigate rich results. As a hub, it proposes redirections to others platforms to make you benefit from your discoveries (Youtube, Deezer and more).
DERI Pipes: Open Source, Extendable, Embeddable Web Data Mashups
Inspired by Yahoo's Pipes, DERI Pipes is an engine and graphical environment for general Web Data transformations and Mashup.
OWLIM is a family of semantic repositories, or RDF database management systems, with the following characteristics:
native RDF engines, implemented in Java
delivering full performance through both Sesame and Jena
robust support for the semantics of RDFS, OWL 2 RL and OWL
The OpenCyc Platform is your gateway to the full power of Cyc, the world's largest and most complete general knowledge base and commonsense reasoning engine. OpenCyc contains hundreds of thousands of Cyc terms organized in a carefully designed ontology. Cycorp offers this ontology at no cost and encourages you to make use of, and extend, this ontology rather than starting your own from scratch. OpenCyc can be used as the basis of a wide variety of intelligent applications ..
"Omnity is based on fundamental advances in associative semantic search technology, through which we create landscapes of meaning-based relationships arising from the semantic signatures of entire documents. In this manner, the knowledge contained within whole documents can be deeply inter-connected, solely through shared ideas."
Semantic Scouting is designed by the Semantic Technology Lab (STLab), which includes researchers and engineers from the Information Systems Office (SI), and the Institute of Cognitive Sciences and Technologies (ISTC):
Roistr's Semantic Relevance Engine can analyse that information like a human so you can discover the meaning.
With that, you can cluster or match similar documents and compare them against each other.
"OSF can integrate and manage all types of content - unstructured documents, semi-structured files, spreadsheets, and structured databases - using a variety of best-of-breed engines. All external content is converted to the canonical RDF data model, enabling common tools and methods for tagging and managing all content. Ontologies provide the schema and common vocabularies for integrating across diverse datasets."