| wsws.org | World Socialist Web Site |
| socialistinternational.org | The Socialist International |
| icl-fi.org | International Communist League |
| union-communiste.org | International Communist Union |
| istendency.net | International Socialist Tendency |
| isg-fi.org.uk | The Fourth International (United Secretariat) |
| ibrp.org | International Bureau for the Revolutionary Party |
| bolshevik.org | International Bolshevik Tendency |
| virglob-sp.org | The Virtual And Global Social Democratic Party - Political Education World-wide |
| marxist.com | In Defence of Marxism |
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