The poll had a record participation (over 1,100 voters). Among them, 43% used only commercial software, 32% only free software, and 25% both. The average number of tools per user was 2.2.
RapidMiner, R, and Excel were again the most popular tools, with SAS remaining the top commercial tool. Pie chart shows the breakdown of voters by region. We also note that W. European data miners had the highest % of free tool use (due to popularuty of tools like RapidMiner and KNIME there).
Read full story at http://www.kdnuggets.com/2011/05/tools-used-analytics-data-mining.html