Io is a small, interpreted, embeddable, pure object-oriented, prototype-based, garbage collected language. Speed: similar to Perl, Python, Ruby. Influences: Smalltalk; Act1, Self, NewtonScript; LISP; Lua. Descriptions, documents, download, mail list. It is open source, with a BSD license.
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Small, embeddable, object-oriented, prototype-based, garbage collected language; faster than Perl, Python, Ruby; supports actors and futures for concurrency. Influences: Smalltalk; Act1, Self, NewtonScript; Lisp; Lua. Descriptions, documents, download, mail list. [Open Source, BSD]
Blame it on Io! A Slow-paced Introduction to the Io Language
Brief Io totorial, part one. [Ozone, Weblog Archive]
Io Programming Language
Growing article, with links to many related topics. [Wikipedia]
Io author site: links (several types including programming), projects, resume, weblog.