The Internationalist Perspectives is a magazine circle made up, literally, of a hand-full of people in the US and in Belgium. It is not an organization. Controversies is also a magazine circle based in Belgium and Holland. Ex-CBG is, to my knowledge, made up of three people in Scotland. Again, not an organization. The Fraction of the Communist Left is a handful of people in Paris, and I'm not sure whether they would even count as a proper magazine circle, because I'm not sure whether they actually publish a magazine (and am not sure whether anyone in their right mind would actually buy a magazine half of which is about a tiny organization). Mouvement Communiste, Insurgent Notes and n+1 are also magazine circles based in France, the US and Italy respectively. Klasbatalo is a magazine circle in Montreal. TPTG and KPK I know are more than magazine circles - I would personally qualify them as organizations of sorts, although not international organizations. The three Bordigist organizations listed, I would qualify as actual international organizations although minor ones.