Id Nouveau
A dataflow language by Arvind
Id Nouveau began as a functional language, added streams, resource managers and I-structures (mutable arrays). Loops are syntactic sugar for tail recursion.
See also Id.
["Id Nouveau Reference Manual", R.S. Nikhil, CS TR, MIT, March 1988].
["Id (Version 90.1) Reference Manual", R.S. Nikhil, CSG Memo 284-2, LCS MIT, July 15, 1991].