KNIME - KNIME, the open platform for your data.
Serena Dimensions RM - Serena Dimensions RM is a web application to improve the definition and management of requirements across the product lifecycle.
Apache Mahout - Distributed Linear Algebra
ReqView - Simple and powerful requirements management tool enabling easy requirements gathering, traceability tracking and offline collaboration.
WEKA - WEKA is a set of powerful data mining tools that run on Java.
Visure - Visure offers a flexible , modern and complete requirements ALM Platform (Application Lifecycle Management).