GraceNotes - A totally free Bible-based curriculum. Everything a person needs to be a knowledgable teacher of the Word can be found here. I totally recommend the Associates in Bible Teaching for anybody serving in a small group, children's ministry, teen ministry, etc.
Grace Biblical Seminary - What I like is that they accepted my GraceNotes work and applied it to Undergraduate work. So that would be a way to cut costs. Their tuition is pretty good as well.
Christian Rideshare Drivers - Blog for those driving for ride-share companies, food delivery folks, basically those that miss normal activities because of the work they do.
Wenstrom Ministries - In-depth material, including details on the original language. Get resources for sermon prep.
RockFish Church - Good sermons, and a killer vision.
Exponential - Great source of the material (some free) for planting churches. They have classes to determine is a prospective church planeter should be involved in planting churches.
Thom S. Rainer, Growing Healthy Churches - He also has training for revitilization, intermin pastors, and many "doing" church resources.