With so many donors and agencies involved in relief and reconstruction, it's impossible to list them all here, but the Asian Development Bank and the International Federation of Red Cross and Red Crescent Societies sites are worth a look.

The World Bank set up a comprehensive tsunami micro-site. There's a lot on damage assessment and reconstruction as you'd expect, but also some good human interest features and slideshows.

Several useful reports published in 2009 look at lessons learned from the international response to the tsunami, including The Tsunami Legacy by the Tsunami Global Lessons Learned Project and A ripple in development? by the Tsunami Evaluation Coalition.

Earlier reports include Action Aid's look at human rights in the tsunami recovery operation - an interesting read and highlights issues often overlooked in reporting on disasters.

In the run-up to the second anniversary Britain's Independent newspaper printed a useful article on why so much aid money was sitting in the bank when two thirds of survivors were still waiting for permanent homes.

Forced Migration Review devoted an edition to the tsunami, examining a host of issues ignored by mainstream media. These included the question of whether the tsunami diverted funding from other crises and a look at the plight of migrant workers caught up in the disaster who were ignored by governments and aid agencies.

The International Committee of the Red Cross has a film on the tsunami which you can download to watch online.