Page at Massachusetts Institute of Technology, Computer Science and Artificial Intelligence Laboratory (CSAIL), in the PDOS group, of main Arc coauthor. Contact information, list of publications, talks.
Lisp-like scripting language for .NET; uses Lisp dialect similar to Arc but tightly integrated with .NET Framework which has a rich set of libraries. Open source GPL.
Lisp dialect by Paul Graham; readings in: design philosophy, lessons, why it isn't especially object-oriented, FAQ. Open source, Perl Artistic License.