The Society of Actuaries is the largest organization of actuaries and offers many designations that can be achieved through different series of testing. The Society of Actuaries offers designations for actuaries interested in working in pension work, health insurance, life insurance, and some other fields.
The Casualty Actuary Society is the second largest organization of actuaries and offers many designations that can be achieved through series of testing. The Casualty Actuary Society offers designations for actuaries that are looking for work in property and casualty Insurance.
Coaching Actuaries is one of the larger study material provers for actuarial students. This is my preferred product when it comes to studying for actuary exams and I have used it for exam P and I am currently studying for exam FM.