Hanno contribuito alla vita di Octogone:
Sara Bartesaghi-Gallo, Raffaella Battaglini, Armelle Bérengier, Elsa Bosc, Federica Buffoli, Margot Carlier, Valeria Cavalli, Paul Chevillard, Philippe Cheytion, Gilles Collard, Gilles Dao, Gualtiero Dazzi, Marie de Bailliencourt, Barbara de Luzenberger, Gilles Denizot, Serge Derouault, Paulo Duarte, Bertrand Farge, Sonia Fanuele, Benedetta Frigerio, Bunny Godillot, Sophie Gubri, Lucienne Hamon, Guillaume Hasson, Anne-Laure Hautran, Ivan Heidsieck, Rémy Jannin, Valentina Kastlunger, Werner Kolk, Gaëtan Kondzot, Yo Kusakabe, Andrea Leonetti, Hélène Lepetit, Alissa Lumelsky, Gerardo Maffei, Philippe Malone, Maria Cristina Mastrangeli, Caroline Michel, Jean-Pierre Michel, Stéphane Oertli, Francine Olivier, Marta Pasquetti, Margherita Piantini, Pietro Pizzuti, Claude Plet, Lorraine Prigent, Andrea Retz-Rouyet, Anna Romano, Véronique Rousseau, Richard Sammel, Armando Schiffini, Susanne Schmidt, Fabrice Scott, Marie Seux, Esther Shalev-Gerz, Bianca Silvestri, Sandro Stellin, Marcello Trotter, Agata Tuszynska, Daniel van de Velde, Arnaud Vincent, Annette Wieviorka.