Islam

Bismillah hir-Rahman ir-Raheem

(In the Name of Allah, Most Gracious, Most Merciful)

Halal Tube
Halal Tube is the largest and most popular site on the web for Islamic lectures by various speakers.

Al Kawthar Academy
Features extensive talks by Shaykh Riyadh ul Haq and many articles as well as an online store.

Darul iftaa
Hanafi fiqh site featuring fatawa from Mufti Muhammad ibn Adam.

Sunni Forum
Best place on the internet for discussion and questions about Islam and also, Sunni ulema regularly post there.