Copyleft (5)

• Front Page — Free Software Foundation — working together for free software (fsf.org) organisation
  Nonprofit behind the GPL, running Defective by Design, End Software Patents and email self-defense
  Advocacy Licensing Nonprofit #
• Software Freedom Conservancy (sfconservancy.org) organisation
  Nonprofit fiscal host for FOSS projects; copyleft enforcement, right-to-repair and policy advocacy
  Advocacy Nonprofit #
• Choose an open source license (Choose a License) reference
  Side-by-side of MIT, GPLv3 and others by what each permits, with well-known projects using them
  License Compliance Licensing #
• copyleft-next (next.copyleft.org) reference
  Open drafting project for a rewritten, shorter copyleft licence; editors Fontana and Kuhn, hosted by SFC
  Governance Licensing #
• Free software is a matter of liberty, not price — Free Software Foundation — Working together for free software (fsf.org) organisation
  Mission and campaigns of the GNU steward: liberty over price, against DRM and software patents
  Advocacy Licensing Nonprofit #