Podcasts
Choose FI: A solid podcast focused on all matters personal finance, with an emphasis on topics related to attaining financial independence. Older episodes, with broader content, are more informative.
The Pillars of FI
The Unfair (FI) Adventures of Teachers
Planet Money: NPR podcast about economics, finance, and other topics. Most content is only tangetially related to personal finance, but it's usually quite informative.
Websites
Mad Fientist: Not updated often, but the content is always good. Focused on reaching financial independence and how to lift after it is reached.
The Millionaire Educator: Also not updated much, but the "free money" posts are simple and great to share with folks trying to get a baseline understanding of taxes and why tax avoidance is important.
Mr. Money Moustache: One moustached man's journey to financial independence. The linked article, which takes about 2 minutes to read, is famous within the community.
The Points Guy: Credit card rewards website. It's sometimes hard to separate useful content from ads, but I've found the site to be a great starting point when selecting a credit card.
Stock Series by J.L. Collins: Recommendations for stock investing and how to handle market downturns. A quick and easy read.
Forums
Bogleheads: Passive-investing focused advice from the followers of Vanguard founder, Jack Bogle. Sophisticated discussions with lots of math.
r/churning: The forum is formatted in such a way that it is useless. But there are great resources available in the sidebar. Best for those that want to really dive-in.
r/FinancialIndependence: This is the best personal finance forum I've found online. Most useful for those in the wealth building phase of life.
r/PersonalFinance: Extremely active forum. A lot of useless posts to slog through, but by using the search feature, you can find questions and answers for just about any topic.