Music Composers Unite!
I am starting this thread to share opportunities in which you may have your works performed and have the ability to work alongside fellow composers to write new music. Some of these programs have age restrictions, though many offer tracks for college students and beyond.
Here are a few excellent programs I have come across:
And here is another list with additional opportunities: Peabody's list of Workshops and Summer Festivals for Composers
Share other festivals/institutes/camps you may come across below!