Cognos Insight, a great self-service BI product by IBM comes in three editions :
First of all there is the Personal Edition : this is completely free, and can be downloaded from https://www.analyticszone.com/
If offers a great deal of functionality, but you can't share your analysis and you can import only 1 source. At the same website you can also download some samples that show the full potential of the tool.
The Standard Edition can be licensed separately and does include sharing and multi source. The last edition is the Enterprise Edition. It comes packaged with the enterprise version of Cognos BI and with Cognos Express. This edition fully integrates into your enterprise BI system.
Be sure to check it out !