Human Rights Watch offers good background, testimony from the accused during the trial, and annual reports on the status of human rights in Iraq from 1992-1996. The 1993 report is available as well.
The Iraq Memory Foundation includes an interview with a survivor of al-Anfal.
A Canadian Broadcasting Corporation page offers a brief overview of al-Anfal along with an interview with Barham Salih, the Prime Minister of the Kurdistan Region of Iraq.
The BBC has a timeline with embedded news links regarding the Anfal trial of "Chemical Ali" and his co-defendants.
Anfal and Halabja
Anfal as Gendercide
Human Rights Watch´s comprehensive report “Genocide in Iraq – The Anfal Campaign Against the Kurds"

na. Woman visits Halabja graves. N.d. Halabja, Halabja Kurdistan. http://mediagallery.usatoday.com/Halabja. Web. 23 Mar. 2012.

Iraqi Anfal Campaign (1988)