Apache Lens (attic-lens)
Category: retired, big-data
Programming language: Java
Lens provides an Unified Analytics interface.
      Lens aims to cut the Data Analytics silos by providing a single view of data across
      multiple tiered data stores and optimal execution environment for the analytical query.
      It seamlessly integrates Hadoop with traditional data warehouses to appear like one.
    
Release: 2.0.1-beta-incubating (2015-03-04)