The theme of the third edition of the co.LAB seminar will take place on 4 February from 9:00 to 11:30. The topic is "Collaborative design: models and tools". The guest speaker is Jean-Marie Burkhardt (LaPEA, Univ. Gustave Eiffel). Elsa Paukovics, Estelle Prior and Simon Morard, PhD students at TECFA, will present their work on the sharing of tools dedicated to collaborative design.