The Center for Applied Nonviolent Actions and Strategies (CANVAS) in Belgrade, Serbia.
The Yes Men based in New York
User-generated database of creative activism
Advancing Indigenous Peoples’ Rights & Cultures Worldwide
https://www.worldanimalprotection.org/
On a mission is to create a better world for animals!
Probably the globe’s largest and most powerful online activist network promoting global activism on issues such as climate change, human rights, animal rights, corruption, poverty and conflict.
Ending deforestation is our best chance to conserve wildlife while defending the rights of forest communities. It is also one of the quickest, most cost effective ways to slow the effects of climate change.
Greenpeace is known for its direct actions and has been described as one of the most visible environmental organisations in the world. It has raised environmental issues to public knowledge.
Probably the biggest resources site for anyone interested in veganism.