LIMES is a link discovery framework for the Web of Data. It implements time-efficient approaches for large-scale link discovery based on the characteristics of metric spaces. It is easily configurable via a web interface. It can also be downloaded as standalone tool for carrying out link discovery locally.
SparQLed is an interactive SPARQL editor that provides context-aware recommendations, helping users in formulating complex SPARQL queries across multiple heterogeneous data sources.
B. Elliott, E. Cheng, C. Thomas-Ogbuji, und Z. Ozsoyoglu. Proceedings of the 2009 International Database Engineering & Applications Symposium, Seite 31--42. New York, NY, USA, ACM, (2009)