Here is some free data analyst tools you could need. Feel free to share any amazing tool I should be aware of.

Data mining

See this post for a comparison.

  • Weka : Data mining in Java with a GUI
  • R : More popular than Weka. I’m not a big fan but sometimes it just get the job done.


  • Postgresql : My favorite database for data analytics.
  • MySQL : Simple database, better than having multiple csv file in a directory. Lack of advanced functions.


See this post for a comparison of those ETL tools.

  • Kettle : Effective when you are used to it. My favorite currently.
  • Talend : Shiny but slow and a bit buggy. Generate a Java or Perl program.