https://www.acorncourses.org/pages/all-courses
Focus on Gambling

AllCEUs
Massive library of free or low cost CEU's on all subjects

https://imis.counseling.org/store/catalog.aspx#filter-by=free-ce 
Has courses on Risk Management, Ethical & Legal Issues, Trauma, Licensure and more...

 

https://apn.com/apn-university/
Continuing Education for Mental Health Professionals