Microsoft has released a trial version of Microsoft SQL Server 2012

Microsoft SQL Server 2012 enables a cloud-ready information platform that will help organizations unlock breakthrough insights across the organization as well as quickly build solutions and extend data across on-premises and public cloud backed by capabilities for mission critical confidence.

SQL Server 2012 enables a cloud-ready information platform that will help organizations unlock breakthrough insights across the organization as well as quickly build solutions and extend data across on-premises and public cloud backed by capabilities for mission critical confidence:

Deliver required uptime and data protection with AlwaysOn
Gain breakthrough & predictable performance with ColumnStore Index
Help enable security and compliance with new User-defined Roles and Default Schema for Groups
Enable rapid data discovery for deeper insights across the organization with ColumnStore Index
Ensure more credible, consistent data with SSIS improvements, a Master Data Services add-in for Excel, and new Data Quality Services
Optimize IT and developer productivity across server and cloud with Data-tier Application Component (DAC) parity with SQL Azure and SQL Server Data Tools for a unified dev experience across database, BI, and cloud functions

  Microsoft SQL Server 2012 Evaluation