Straight from their website:
Reporters Without Borders:
defends journalists and media assistants imprisoned or persecuted for doing their job and exposes the mistreatment and torture of them in many countries.
fights against censorship and laws that undermine press freedom.
gives financial aid each year to 100 or so journalists or media outlets in difficulty (to pay for lawyers, medical care and equipment) as well to the families of imprisoned journalists.
works to improve the safety of journalists, especially those reporting in war zones. READ MORE ON THEIR WEBSITE