Here some organizations, some of them in Mitte:
LesMigraS (they do antidiscrimination and anti-violence work and counseling in different languages for Lesbians/bisexual Migrants, Black Lesbians and Trans*people):
http://www.lesmigras.de/english.html
ABqueer (counselling and education):
http://www.abqueer.de/
Schwulenberatung Berlin (counselling for homosexuals):
https://www.schwulenberatungberlin.de/ (Every tuesday and friday from 2-6pm meeting point, help, support, counselling and community services for LGBTI refugees at this adress: Cafe Kuchus, Wilhelmstraße 115, 10963 Berlin-Kreuzberg.)
Phone: 030 – 233 690 70
info@schwulenberatungberlin.de
Sonntagsclub:
http://www.sonntags-club.de/international/englisch.html
GLADT (independent self-organized association of LGBTT from turky, events, counselling, language-courses):
http://www.gladt.de/