These are tools that provides analysis of data stored in a database. OLAP tools enable users to analyze different dimensions of multidimensional data. For example, it provides time series and trend analysis views. OLAP often is used in data mining.

C/C++ Online Analytical Processing (OLAP) Components by Elixir Technology

Elixir Data ETL 7.2.2 -  Elixir Repertoire version 7.2.2 pioneers the use of RESTful architectural approach for Business Intelligence. With this release, Elixir is leading the industry with an open Business Intelligence server that easily integrates with prevailing technologies such as Java and .NET for building web or standalone applications, as well as emerging "Web 2.0" technologies such as AJAX, Flex2, and Ruby for building Rich Internet Applications.