How to search for internal bus connections in Germany, for example between Munich and Berlin?
The question on Travel.SE about cheap bus lines gives many bus companies that offer inter-Germany bus connections. So if I'd like to find best connection for me (which could be by price, but as well by the departure/arrival hour) I'd have to go to all of the sites and check.
Are there some aggregating sites for Germany, where I can find all connections from all companies for given route? For Poland for example, there are sites like e-Podroznik