One of the greatest things about our modern technology is the amount of free resources. I am publishing this as a place for me to recommend and keep track of my favorite marriage resources.
5 Stars
Connection Codes Their foundation courses are absolutely amazing at helping teach us how to connect with other humans(most spouses are human). The courses are moderately expensive, but the book is inexpensive and the podcast is free.
One Extraordinary Marriage Lots of free resources including 730(as of 11/28/22) episodes of a weekly podcast. That is over 14 years of weekly podcasts, that is truly amazing. They have lot's of inexpensive resources and offer coaching and conferences. Their concept of 6 Pillars of Intimacy is revolutionary.
The Gottman Institute The gold standard in marriage research on what works and what doesn't. Lots of free stuff and lots of content that you have to pay for.
Marriage Fitness An amazing course designed for those in a seriously troubled marriage, but it can help those with smaller issues. Free email list and some podcasts.
Paul and Lori Byerly have 3 different blogs and now podcasts and other resources. Solid and biblically based The Generous Wife The XY Code explaining men to women
4 Stars
Dear Young Married Couple Aimed at younger married couple with lots of free resources and some paid ones.
Dana Che Dana doesn't pull any punches talking about Marriage and Sex. Free and paid resources
Get Your Marriage On Podcasts, Freemium apps and lots of free resources
Dave Ramsey Money causes lots of marital issues and Dave teaches how to handle it better
Growing Love Home of the Love Reboot weekend marriage intensive
Knowing Her Sexually Christian wives explaining women to men
XO Marriage Multiple sources of information with a group of books, blogs, courses, conferences, and podcasts
Books
Married Sex One of the best books ever about sex from a Christian perspective
Argument Hangover How to heal from and learn to avoid disconnecting arguments
How to Improve Your Marriage Without Talking About It
5 Love Languages A marriage classic for a good reason
There are lots of good resources, please don't keep on hurting or give up because you can't figure out what to do. Learn how to relate to your spouse before the pain gets really strong.