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.
Ground news is an aggregator for news sources but it tries to show the bias of the news orgs whose stories it shows. This tool may help you find the independent sources you seek while also informing you of their potential bias and ownership
Unfortunately the social media pages for ground news are plauged with right wingers that turned me off from the site entirely
Paid, but even cheaper tier is worth it.
It has paid tiers, but I’ve been using it for free