Colum has done a nice job of listing the outputs on his blog.
I would also add the following. I notice he has listed "Responsive" layout. That surprises me a bit as the blog post appears to have been made in 2013. That was before RoboHelp 11 was released. And to my knowledge, there was no "Responsive" layout in any version of RoboHelp until version 11 (which is presently the latest release).
This layout type is listed in the Single Source Layout pod as "Responsive HTML5".
Don't forget that version 10 also has a capability to take a generated WebHelp layout and insert that inside a Microsoft HTML Help container so you end up with a "WebHelp inside a CHM".
Additionally, there is one layout type that Colum failed to list on his blog post. Oracle Help.
The other question is - considering RoboHelp 11 was just released, do you mean what outputs does RoboHelp 11 offer? If yes, some links that might be of interest:
(about the new responsive layout editor)