via Stefano, Very nice:
SQLcheck is an interesting (and FREE) Performance Monitor for SQL Server.
With this tool, you can investigates, organizes and explains critical information about your server’s hardware, operating system and SQL Server. With SQLcheck's performance dashboard, you can quickly view detailed explanations and receive recovery suggestions.
Why this tools is interesting for me? Because with this new release (2.0) it can now operate as a secure Screen Saver... really cool!!!