Alwen Tiu and Gopalan Nadathur were members of the Parsifal team during various parts of 2004. During their visits, the team developed a new architecture for automatically computing with expressions involving bound variables within fixed points of finite processes. The system was implemented in Standard ML and is called Level 0/1 . This system has been used to do model checking style deduction, search for winning strategies in game playing, and bisimulation checking for the -calculus. The system is described in  and is available from the Web.
Recently David Baelde and Axelle Ziegler have reimplemented this system in Ocaml. Extensions and improvements with this system are planned for the Ocaml version.