Public Broadcasting System.
It's supported by money from the government, donations from listeners, and some corporate sponsorships.
Conservatives think PBS is too liberal, i.e. not Fox News, and should have NO government funds. This also goes for NPR, National Public Radio. The stations actually raise a lot of their budget from fund raising drives and that comes from relatively small donations from listeners. For example, I normally give about $100 to NPR every year.
The amusing thing to me is that NPR is really quite popular in rural conservative states because there isn't much for-profit broadcasting in remote areas. So, for instance in rural Utah, it's the main source of radio news. It's funny to me that the supposedly liberal bias hasn't seem to have made any impact at all on Utah voters.
EDIT: PBS also broadcasts Downton Abbey -- that's more important than sesame street to me. They have no commercial interruptions which is also quite nice. I listen to NPR more than I watch PBS.