I am trying to move all my XNA projects to Monogame. But in project templates I found only XAML and horrible metro application template. Is MonoGame support creating application in good old windowed mode for Windows 8? If yes how?
I'm not sure what your issue is.
MonoGame (as of 3.0's beta) adds a bunch of template projects to VS2010, including MonoGame Application for Windows. It runs by default as a windowed application, albeit a console one (so it creates a console window too) -- which is eeasily remedied.
Edit: I didn't realize you're asking about Windows 8 specifically. When you install the MonoGame 3.0 (beta), you'll find the Windows 8 assembly you probably need in
%program files%\MonoGame\v3.0\Assemblies\Windows8. As of today (3.0 beta), you probably only need to add a reference to