Tool Link Note
ANACONDA https://www.continuum.io/downloads Python Environment
Rodeo https://www.yhat.com/products/rodeo Python IDE
R https://cloud.r-project.org/ 64-bit
RStudio https://www.rstudio.com/products/rstudio/download3/ Install R first and then install RStudio; download the free RStudio desktop
KNIME https://www.knime.org/downloads/overview Download the FULL version with all extensions
OpenRefine http://openrefine.org/download.html Data clean
NodeXL https://nodexl.codeplex.com/ Excel add-on (Windows only)
Tableau Public https://public.tableau.com/s/ Data visualization (the free version of Tableau)
Gephi https://gephi.org/ Network visualization
Voyant https://voyant-tools.org/ Text analysis and visualization
JSON Editor Online http://www.jsoneditoronline.org/ Parse JSON structure
Datawrapper https://www.datawrapper.de/ Visualization online (chart + map)
reaper https://github.com/ScriptSmith/reaper Social media scraping GUI (Facebook, Twitter, Reddit and Youtube)

Hai Liang