Reporting options for different test frameworks

I'm looking at what reporting options are available for various BDD test frameworks, besides the standard reporting that is often pacaged with them.

For Python's behave framework Allure seems to be widely accepted although behave-teamcity is aslo an option. What options are available for robot?

Also, I'm not at all familiar with .Net. I believe specflow and NBehave are common. What reporting options are available for them?