ELKI: Environment for Developing KDD-Applications Supported by Index-Structures. (Link).
ELKI is an open source (AGPLv3) data mining software written in Java. The focus of ELKI is research in algorithms, with an emphasis on unsupervised methods in cluster analysis and outlier detection. ELKI offers data index structures such as the R*-tree that can provide major performance gains.
Last updated: September 22, 2017