Triple Pattern Fragments (TPF) is a Linked Data interface that minimizes server processing, while enabling efficient querying by clients
Sparklis is a query builder in natural language that allows people to explore and query SPARQL endpoints with all the power of SPARQL and without any knowledge of SPARQL.
LODmilla is a DBpedia visualization service. LODmilla aims at visualizing associations in LOD graphs with special linked data functions such as
Note: Marbles is now released on SourceForge at http://marbles.sourceforge.net. Please see the project page for up-to date information; this wiki page is kept for archival purpose only.
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.