Tutorials & Courses
Learn Tamil - A good PDF course that teaches Tamil.
Learn Tamil Through English - From Duke University. This page offers several PDF resources that teach and allow you to practice Tamil.
Learn To Read Tamil - Basic online lessons that teach you how to read Tamil.
Interesting Reading Practice
BBC Tamil - Up to date news from the BBC in Tamil.
Sify - Online news.
Tamil New Testament - The entire New Testament available in Tamil.
Wikipedia - Wikipedia in Tamil. If online news isn't interesting enough for you, you can search for whatever you like on Wikipedia.
Things To Listen To
BBC Audio - The BBC offers a Tamil program.
China Radio International - Lots of audio is available from China. An interesting resource from a different perspective.
Global Recordings Network - Provides several free Christian audio recordings. A great resource.SBS Radio - Offers short audio files covering various subjects.
Tamil Bible - The entire Tamil Bible available in Real format.
Other Tamil Resources
Learn Tamil - Teaches some basic expressions.
Linguanaut - A useful collection of basic phrases.
Verbix - The best online verb conjugator I have found. Just type in a verb and Verbix will completely conjugate it for you.