If you are a developer of SSIS packages then this article (here) will give you a good run down on the SSIS package deployment improvements in SQL Server 2012. These improvements will definitely make your life easier in deploying SSIS packages to multiple servers and environments.
The SQL Server 2012 Performance Dashboard is a free tool from Microsoft and assists in viewing the health and status of your SQL Server instance. It even works on SQL Server 2008. You can download it from (here).
Well not quite yet but the CTP1 (here) is out so you can download it and have a play. Some big changes are on the way including the In-Memory OLTP engine, ability create to Asynchronous Availability Groups to the Azure