The Continental style Grand Lodges and Grand Orients have created several organizations in order to organize their international relations, such as CLIPSAS, the International Secretariat of the Masonic Adogmatic Powers, and the International Masonic Union Catena.
Other bodies predicate their assessment of regularity on the 8th decree of Anderson’s Constitution; a Lodge is regular if it works in conformity to the rules of its granted constitutional patent. Grand Lodges certify regularity to their recognized Member Lodges and Grand Lodges with patents.
(the source/read more: Wikipedia)
C.L.I.P.S.A.S. (Centre de Liaison et d’Information des Puissances maçonniques Signataires de l’Appel de Strasbourg)
E.M.A. (European Masonic Alliance)
A.A.C.E.E. (Adogmatic Associations of Central and Eastern Europe)
M.M.U. (Massonic Mediterranean Union)