As noted in my previous posts regarding Arisia, Unheard Voices is a roadshow panel promoting three organizations promoting diversity in writing and reading in the science fiction and fantasy genres: Carl Brandon Society, Broad Universe and Outer Alliance. We throw a lot of things at the audience and each other, then try to remember them afterwards. Here's my best current effort, plus a few other things that didn't get mentioned given panel time constraints.
Women in SF/F/H:
Broad Universe - Member catalog www.broaduniverse.org/catalog/
SF Mistressworks - reviews of classic SF/F by women: www.sfmistressworks.wordpress.com
Feminist SF Bibliography - http://feminist.org
100 Great Science Fiction Stories by Women - Ian Sales'blog
Worlds Without End Women of Genre Reading Challenge - reviews
Gender in SF/F/H:
Tiptree Awards - science fiction and fantasy that expands and/or explores understanding of gender. Award winners and short/honor lists
LGBTQ SFF:
Lambda Sci-Fi - resource list http:///www.lambdascifi.org/books/recommend.html
Gaylactic Spectrum Awards - award winners and recommended lists
GLBT Fantasy Resources and Reviews - www.glbtfantasy.com
My posts on SF Signal: "LGBT Science Fiction and Fantasy in the 1970s" and "LGBT Science Fiction and Fantasy Before 1970"
And another post, this one for the Lesbian Fiction Appreciation Event 2012 - "Lesbian Protagonists in Science Fiction and Fantasy"
Rainbow Awards - see lists of nominees, finalists and winners for the last several years
American Library Association GLBT Roundtable Rainbow lists
People of Color and Writers of Color in SF/F/H:
Carl Brandon Society - resources and award lists
Carrie Cuinn - bibliography: 100+ Asian Speculative Fiction Authors
Sofia Samatar - Horror Writers of Color
Diversity Roll Call Roundup: POC in Sci-Fi and Fantasy
Making Lists: Mindblowing SF by Women and People of Color
Fantasy Magazine - People of Color in Fantasy Literature - Three Part Roundtable Writeup
Steampunk - Beyond Victoriana
General Diversity lists:
Diversity in YA