Tisha B'Av is not a day for in-depth study but light reading of appropriate material is allowed. These three websites have such resources. Please add to this list of Orthodox resources in the comments section.
OU
Aish
Ohr Somayach
Torah.org
VBM (Gush)
TorahWeb
Artscroll Gemara (Gittin 55b-56a in English)
Artscroll Kinnos for the Holocaust
Wednesday, August 02, 2006
Tisha B'Av Resources
9:35 AM
Gil Student