• Alliance for Democracy is a populist movement to end the domination of our economy, our government, our culture, our media and the environment by large corporations, which increasingly propose to dominate our lives through rules set by international trade and investment agreements.
• Campaign for America's Future is a national organization challenging the big money corporate agenda by encouraging Americans to to discuss a new vision of an economy and a future that works for all of us.
• Change.org (not to be confused with Barack Obama's Change.gov site) has a proposal to end corporate personhood.
• Citizen Works, a group founded by Ralph Nader, proposes to crack down on corporate crime, protect workers and investors, roll back the tide of deregulation and reduce excessive corporate power and influence over government, including a constitutional amendment to end corporate personhood.
• Corporate Accountability Project includes links to the Corporate Welfare Information Center, Corporate Dirt Archives and Corporate Power Information.
• Corporate Governance provides resources for institutional and individual shareowners to better govern corporations, enhancing both corporate accountability and the creation of wealth.
Democracy Unlimited of Humboldt County, Calif. has led efforts to pass local initiatives limiting corporate power, including a 2006 initiative that banned non-local corporations from making financial contributions to local elections.
• Multinational Monitor writes on corporate abuses as a project of Essential Action.
• The New Rules Project of the Institute for Local Self-Reliance proposes a set of new rules that builds community by supporting humanly scaled politics and economics and limits on corporate power.
• The National Lawyers Guild works for basic and progressive change in the structure of our political and economic system.
• Program on Corporations, Laws and Democracy researches corporate, labor and legal histories, rethinking organizing strategies and talking with people about democracy movements. One of its founders, Jane Anne Morris, has written a book, "Gaveling Down the Rabble: How 'Free Trade' is Stealing Our Democracy" (Apex: 2008).
• The Progressive Populist's Essay Page examines abuse of corporate power.
• David T. Ratcliffe's rat haus reality press has some good resources on ending corporate governance.
• Reclaim Democracy aims to restore citizen authority over corporations and proposes a constitutional amendment to revoke corporate personhood that entitles corporations to claim protection under the Bill of Rights, as well as reversing Buckley vs. Valeo (the 1976 Supreme Court ruling that spending money to influence elections is a form of constitutionally protected free speech) and establishing a constitutional right to vote.
• Thom Hartmann, who hosts a daily show from 11 a.m.-2 p.m. CT on Air America Radio, has written a book, Unequal Protection: The Rise of Corporate Dominance and Theft of Human Rights (Rodale Books, 2004).
• David Korten, co-founder and chairman of Yes! Magazine, has written When Corporations Rule the World, The Post Corporate World: Life After Capitalism, was a major contributor to the report of the International Forum on Globalization on Alternatives to Economic Globalization. His most recent book is The Great Turning: From Empire to Earth Community.
See the Wikipedia summary of the Corporate Personhood Debate.