Server Performance Advisor
Downloading Server Performance Advisor 3.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The program's installer is commonly called spa.exe.
The software lies within Internet & Network Tools, more precisely Network Tools. We recommend checking the downloaded files with any free antivirus. The most popular versions of the Server Performance Advisor 3.0, 2.0 and 1.0. This free program is an intellectual property of Microsoft.
From the developer:
Microsoft Server Performance Advisor (SPA) helps IT administrators to collect metrics in order to identify, compare and diagnose potential performance issues in a Windows Server 2012, Windows Server 2008 R2 or Windows Server 2008 deployment. The program contains two parts: the SPA framework (a console and libraries) and the advisor packs.
You may want to check out more software, such as Wing FTP Server, File Type Advisor or SMS Server, which might be related to Server Performance Advisor.