InfraNodus - Generates research insights using text network visualization and analysis.
RapidMiner - RapidMiner is a software platform for data science teams that unites data prep, machine learning, and predictive model deployment.
arXiv - arXiv is a free distribution service and an open-access archive for scholarly articles.
KNIME - KNIME, the open platform for your data.
Unpaywall - Legally read research papers behind paywalls.
WEKA - WEKA is a set of powerful data mining tools that run on Java.