FBI files on Homophile Movement:
Harry Hay FBI file -- The FBI did not realize Hay was a gay activist; this file reflects his Communist Party activity.
It is useful for insights into FBI interest in the Communist Party
Bob Hull FBI file
Chuck Rowland FBI file
W. Dorr Legg FBI file -- He is referenced in other files
Donald Webster Cory (Edward Sagarin)
Mattachine Society (Los Angeles) FBI file released to me, Part 1 and Part 2: See link below for a differently redacted version.
The FBI's online file on the Mattachine Society can be found HERE
FBI Field Office files of Mattachine Societies in LA, SF, NY, Washington, DC (including Frank Kameny's Mattachine Society of Washington):
Part 6 (MSW)
Buell Dwight Huggins -- head of first version of Mattachine Society in DC (before Kameny)-- FBI File: Part 1, Part 2, Part 3--from Mattachine FBI file
Mattachine Society of New York FBI file
Daughters of Bilitis FBI file: that released to me, and that at the ONE Institute & Archive in L.A., and the GLBT Historical Society in SF.