Below are links to some international organizations for lesbian, gay, bisexual, and transgender psychology.
Division 44 of the APAA division of the American Psychological Association dedicated to the study of Lesbian, Gay, and Bisexual Issues.
GASP (GLBT Alliance in Social and Personality Psychology)This is also a United States based organization affiliated with the Society for Personality and Social PsychologyGay and Lesbian Issues and Psychology GroupPart of the Australian Psychological Society.
KluwerArchives of Sexual Behavior
SAGERelevent Journals relating to Gender & Sexualities
EBSCO- LGBT Life A leading Index of LGBT Literature