Io
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]
Io Programming Language Gear
T-shirt, coffee mug, and mousepad that quote Ludwig Mies van der Rohe.
IoL4
Small OS composed of Io programming language atop L4 OS microkernel. Runs IoVM (virtual machine) as single server in kernel level, giving direct hardware access and independence from needing full OS and userland. [Open Source, BSD]
IoLanguage
Wiki by by Sebastien Pierre. Tips, news, projects.
mod_io, eIo
Add ons for dynamic content via Io: mod_io is module for Apache 2, for faster execution/caching of Io-based content; eIo is CGI application/library similar to eRuby. Descriptions, documents, downloads. [Open Source]
Steve Dekorte
Io author site: links (several types including programming), projects, resume, weblog.
Yahoo Groups: iolanguage
Mail list and forum for Io language.