Arc

Arc
Lisp dialect by Paul Graham; readings in: design philosophy, lessons, why it isn't especially object-oriented, FAQ. Open source, Perl Artistic License.
http://www.paulgraham.com/arc.html

Google Groups: LSharp
User community, forums with several threads.
http://groups.google.com/group/lsharp/

L Sharp .NET
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.
http://www.lsharp.org/

Rob Blackwell
Weblog on development, news, views, software experiments, by L Sharp author.
http://www.robblackwell.org.uk/

Robert Morris
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.
http://pdos.csail.mit.edu/~rtm/

SourceForge.net: L Sharp
Project page, with downloads, repositories, forum.
http://sourceforge.net/projects/lsharp/

Wikipedia: Paul Graham
Encyclopedia article, with links to many related topics.
http://en.wikipedia.org/wiki/Paul_Graham

Wikipedia: Robert Tappan Morris
Encyclopedia article, with links to many related topics.
http://en.wikipedia.org/wiki/Robert_Tappan_Morris