Definition of independent for the purposes of this question: source is not owned by a for-profit corporation, is not financially backed by any billionaire (either directly or via foundation or nonprofit organization) and is not financed by any national government (even if run without oversight).
It can have any perceived bias or political leaning.
Edit: Just to add it has to be written in English.
I listen to NPR often and I enjoy it, but it ultimately has the same problem as other mainstream outlets in that they are beholden to advertisers and, in turn, to extractors of capital. It leans left socially, but as with almost all other major news organizations, it is self-interested and will almost always support neocolonialist US practices. One tiny, not-the-best but temporally relevant example – they have yet to call what’s happening in Gaza genocide.
As someone else mentioned, there is Democracy Now!, they are viewer funded, but that is also supplemented by groups such as the Ford Foundation, which obviously has ties to capital as well. Still, Democracy Now! will give more of an “outside looking in” view of the United States.
I like listening to both NPR and Democracy Now! to hear both the US-centric (capitalist) points vs the a more global (and anti-capitalist) viewpoint.