Avaaz.org – check out their chart which documents their successes so far and future targets
Earth Hour on Mashable – a one-stop shop for promoting Earth Hour online.
Games for Change – a non-profit organisation that creates games for charities, government and local health authorities to highlight social, educational and human rights issues, can provide new and effective ways of raising awareness and engaging users.
Zynga, producer of popular Facebook games such as FarmVille, was able to help raise $1.5 million in 5 days for the UN’s World Food Programme. They achieved this by selling virtual goods (for real money), which help players advance to different levels or areas in their online games.