SQL Server
Say what you will about Microsoft and its interesting collection of officers. It's profitability exceeds all other tech companies, and SQL Server helped put it there. Sure, Microsoft's desktop operating system is everywhere, but if you're running a Microsoft Server, you're likely running SQL Server on it. SQL Server's ease of use, availability and tight Windows operating system integration makes it an easy choice for firms that choose Microsoft products for their enterprises. Currently, Microsoft touts SQL Server 2008 as the platform for business intelligence solutions.
