Toastmasters is an excellent organization to help people become better public speakers and effective leaders. As mentioned by another person in this thread, all speaking projects are evaluated by other members according to criteria. read more
Joining Toastmasters will help you to get more confident when communicating with people. Thus, you might get more confident and lower your anxiety levels. Stress and anxiety are one of the triggers of stuttering and might make it more severe when you're speaking in front of a group. read more