Emergency Medicine has the richest ecosystem of free continuing education available of any specialty, which is what I use mostly. There are literally dozens of blogs and podcasts that put out pretty good content on a regular basis -- while a lot of them will cover the exact same journal articles or topics (essentially EM Memes), some are really, really good and put lots of effort into deep dives into a specific area.
Emergency Medicine Cases was mentioned above and I think is probably putting out the best content now.
EMDocs does a lot of curation and aggregation of other sites' content, which is nice if you don't want to go looking on your own. In terms of individuals, everyone knows about the EMCrit ecosystem (check out the IBCC if you haven't --
the podcast that Farkas and Thomas put out is really, really good). Another individual who publishes things less frequently but who is a very good teacher is
Ruben Strayer.
Many residencies such as
Northwestern,
Hennepin,
SUNY Downstate and I'm sure a lot others that I'm missing put their content online. You can find a lot of lectures from
EM Board Review series on YouTube. Conferences like
CODA put their lectures online for free and you can find a lot of good EM Content from EM Conferences like
Essentials online for free or pay for the CME and full access.
For keeping up with blogs I use Feedly, which is an RSS Aggregator, to keep track of a bunch and I'm sure I'm missing some good ones that I have started putting out content. I also follow some internal medicine podcasts (
Curbsiders is pretty good, but only occasionally EM relevant depending on how IM-ish you are and how much workup you want to get started in the ED for outpatient f/u or for your hospitalists) and surgical / critical care podcasts.
You have to be cautious about taking everything from the FOAMed world at face value, and most sites do not grant CME for licensure purposes (though some do and it's worth supporting the individuals who make all this if you can) but it's a great jumping off point for keeping up with the literature and refreshing your memory on things you don't see very frequently.