Very good idea!
Many great links that I use myself have already been shared, but I think I can contribute with some of my favourite links:
Media: I mainly use Arte, TV5 monde and RFI, which have already been mentioned many times.
Dictionaries: personally, I use it a lot during my readings to create my flashcards. Here are those I find the most useful:
http://www.larousse.fr/http://www.linguee.fr/ (the platform also has a translator – DeepL – that is great)
http://www.expressio.fr/MOOCs: to follow completely free courses, I recommend the FUN platform which often offers beginner or intermediate French courses:
https://www.fun-mooc.fr/For audiobook lovers, I saw the excellent website Audiocite has already been mentioned, but there are also several other platforms that provide access to free online libraries:
https://archive.org/details/AuFilDesLectureshttp://www.bibliboom.com/https://librivox.org/Blog: to continue learning and discovering new things about French culture, I also regularly read the following blogs:
https://www.fluentu.com/blog/https://thefrenchlearninginstitute.com/blog/https://www.frenchtoday.com/blog/Bon apprentissage !