Quepy – a python framework to transform natural language questions to queries in a database query language, can be easily customized to different kinds of questions in natural language and database queries.
Yahoo! Content Analysis API – detects entities/concepts, categories, and relationships within unstructured content.
dataTXT semantic text API – dataTXT is a set of semantic APIs to extract meaning and insights from texts in several languages. It's optimized for short texts, such as tweets and other social media.
AlchemyAPI – cloud-based text mining platform provides semantic tagging through a set of natural language processing capabilities including named entity extraction, sentiment analysis, concept tagging, author extract
ImageSnippets™ – an application for creating and editing metadata about images using linked data (structured data) techniques, in beta testing as of this writing, which leverages and builds on the DBpedia data set
Vague Places extractor – experimental tool for extracting area polygons/multipolygons using the name of a place, or simply extract DBpedia points in a WKT format.
WordPress PoolParty Plugin – helps to make WordPress blogs and websites more understandable by linking posts with key terms and key terms with other key terms
DBpedia Spotlight – tool for annotating mentions of DBpedia resources in natural language text, providing capabilities useful for