KNIME - KNIME, the open platform for your data.
Freeplane - Freeplane is a powerful and free software for building mind maps.
RapidMiner - RapidMiner is a software platform for data science teams that unites data prep, machine learning, and predictive model deployment.
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
WEKA - WEKA is a set of powerful data mining tools that run on Java.
SuperNotecard - Introducing SuperNotecard. SuperNotecard is an online writing tool that features virtual notecards to help arrange facts or scenes, track details, organize paragraphs, and clarify your composition process.