What publicly available software do professional stock traders use for stock analysis? I assume they use something more advanced than Google Finance... right?
Factset also provides a host of tools for analysis. Not many people know as they aren't as prevalent as Bloomberg.
Bloomberg Professional seems to be very popular. It provides any kind of data you can imagine. Analysis is a subjective interpretation of the data.
Bloomberg is very popular, especially for researching individual companies.
Microsoft Excel and Matlab are very common for analyzing the data. Lots of time traders will take data from Bloomberg, Market QA, Factset or where ever, and then actually preform their analytics in Excel or Matlab.
A lot of the brokers provide their own software to traders using their platform, and that software can also contain different tools to help the traders as well.