There are more websites for sure but these but this is a good primer to start on researching the landscape of abolition activities from these organizations and entities:
MOST INFLUENTIAL
http://ijm.org/
http://www.polarisproject.org/
http://www.freetheslaves.net/
http://www.slaverymap.org/
http://www.chainstorereaction.com/
http://www.notforsalecampaign.org/
http://caase.org/
http://www.endslaveryandtrafficking.org/
http://www.sharedhope.org/
Agape International Missions (Phnom Penh, Cambodia)
The Bridge Program (Seattle)
Children of the Night (LA)
GEMS (NYC)
Gracehaven (Ohio)
Hagar International (Cambodia, Vietnam & Afghanistan)
Love146 (Philippines)
Restore NYC (NYC)
Streetlight USA (Phoenix)
Wellspring Living (Atlanta)
SHELTERS/SAFEHOUSES/RECOVERY
Covenant House (12 U.S. States, Canada & S. America)
Hope Place of Union Gospel Mission (Seattle)
Penny’s Place (Seattle)
Mercy Ministries (Canada, New Zealand, UK)
NEWS
http://topics.nytimes.com/top/reference/timestopics/subjects/h/human_trafficking/index.html
http://thecnnfreedomproject.blogs.cnn.com/
http://humantrafficking.change.org/
http://www.traffickingproject.org/
GOVT-INTERNATIONAL
http://www.state.gov/g/tip/index.htm
http://www.unodc.org/unodc/en/human-trafficking/index.html
http://ecpatusa.org/
http://www.justice.gov/actioncenter/crime.html
LOCAL
http://www.seattle.gov/humanservices/domesticviolence/prostitutedyouth/bridgeprogram.htm | http://youthcare.org/
http://www.ugm.org/site/PageServer?pagename=Hope_Place_homepage
http://pennysplace.typepad.com/
http://www.nhmin.org/
http://waengage.com/
http://www.seattleagainstslavery.org/
FILMS
http://www.callandresponse.com/home.html
http://www.gems-girls.org/get-involved/very-young-girls
http://sexandmoneyfilm.com/
http://redlightchildren.org/
http://nefariousdocumentary.com/
http://streetlightusa.org/branded-the-film/
POLICY
http://www.centerwomenpolicy.org/programs/trafficking/default.asp
TOOLS
http://slaverymap.org/
http://www.chainstorereaction.com/
http://www.callandresponse.com/slavefree/
http://www.free2work.org/
StreetlightsUSA in Phoenix is also a successful safe house: streetlightusa.org
Good point…I added it and more in that category.