charette (n.)youdaoicibaDictYouDict
also charrette, c. 1400, "a chariot, a cart," from Old French charrete "wagon, small cart" (12c.), diminutive of charre (see car). Meaning "collaborative session" is by 1982.
Concorde (n.)youdaoicibaDictYouDict
supersonic passenger airliner, operating from 1976 to 2003, from French concorde, literally "harmony, agreement" (see concord), reflecting the Anglo-French collaborative agreement that produced it.
hackathonyoudaoicibaDictYouDict
"An event, typically lasting several days, in which a large number of people meet to engage in collaborative computer programming", 1990s: from hack1, on the pattern of marathon.