Try Divvy - http://mizage.com/#windivvy

It may not qualify as a "tiling window manager" depending on what you think that should include, but it's excellent for arranging windows.

You might want to try HashWM: https://github.com/ZaneA/HashTWM. Might not be perfect, but you have the source so can fix it up/enhance it.

you can try http://windawesome.codeplex.com/