The Friends of the Ood were an organisation determined to liberate the Ood from slavery and prove Ood Operations was lying to the public about the nature of their slaves. (TV: The Impossible Planet)
Dr Ryder was a member of Friends of the Ood. It took him ten years, but he freed the Ood Brain long enough for it to communicate with the Ood on the Ood-Sphere. When he was outed to Klineman Halpen, Halpen tossed him into the Ood Brain. He died from suffocation. Other pro-Ood supporters included the Tenth Doctor and Donna Noble, who saved the Ood from corporate slavery and were to be remembered by them in song. (TV: Planet of the Ood)
Rose Tyler had also shown sympathy and even questioned the Ood about their treatment. However, she and the Doctor couldn't investigate this further as the Ood became possessed by the Beast. (TV: The Impossible Planet')