Use the "Downloads" tab to search for "Visual Studio 2012."
Microsoft did release (Web, Windows Desktop, and Windows Phone versions) as a free, entry-level product. While the official download links on microsoft.com now redirect to newer versions, you can sometimes find the official ISO via the Visual Studio 2012 download page archive if your account is eligible. visual studio 2012 download microsoft
Some industrial PCs still run Windows Embedded 8 with specific SDKs that only integrate cleanly with VS2012. Use the "Downloads" tab to search for "Visual Studio 2012