From Tunisia to China, activists and journalists are using technology to get vital news out and bring about change. As the battle to control information continues - from government surveillance and online blocking to big business to hacktivists and protesters - Index looks at the key players in the fight for digital freedom. With Rebecca MacKinnon & Ethan Zuckerman: Tools for the future Jennifer Granick: Damage control Gabriella Coleman: Beacons of freedom Eric King: Trade secrets Ahmed Mansoor: free expression in Dubai Milton Mueller: Revolution in crisis Heather Bond: Ushahidi and crowd wisdom Pranesh Prakash: India's internet jam Hu Yong: microblogging in China Alex McGillivray on Twitter Frontline SMS: Anchor to the world. PLUS Fault lines: religion, culture and censorship with Edna Fernandes, Svetlana Mintcheva and Brad Adams AND Fiction from Roma Tearne and Jamal Ali's modern fable.