UIUC made use of LaRCsim and was originally developed for the Smart Icing System Project. It was also developed for the accurate simulation of stalls.
Many aircraft were worked on for FlightGear with UIUC, although many were not GPL or not maintained. Some aircraft were maintained well enough to survive until FlightGear 1.0.0 in 2008. Over the years, they've been expanded with new models, and sometimes converted to other FDMs.
Some UIUC v-1 aircraft include: