Plan 9

Acme Stand Alone Complex - Acme is a programmer's editor, shell, and user interface.
http://caerwyn.com/acme/

Second International Workshop on Plan 9 - A workshop for researchers and developers working on Plan 9 from Bell Labs, Inferno, and related ideas and projects.
http://plan9.bell-labs.com/iwp9/

Bell Labs Innovations: Bell Labs Unveils Open Source Release of Plan 9 Operating System - The official press release. <small>(June 7, 2000)</small>
http://www.bell-labs.com/news/2000/june/7/2.html

Reinventing Unix: An Introduction to the Plan 9 Operating System - Technical paper abstract; link to main article, fee needed. Library Hi Tech; Emerald Group. <small>(December, 2003)</small>
http://www.emeraldinsight.com/Insight/viewContentItem.do?contentType=Article&contentId=861398

NineTimes - News, tips and articles about Plan 9 and Inferno.
http://ninetimes.cat-v.org/

IWP9 2006 - First International Workshop for Plan 9 and Inferno. <small>(December 5, 2006)</small>
http://lsub.org/iwp9/

Plan 9 and Inferno at the Google Summer of Code - News, blogs, source code repositories and other resources for the Plan 9 and Inferno projects part of GSoC.
http://gsoc.cat-v.org

Geeks404.com: Plan 9 from Bell - News coverage of the Open Source release of the third edition of Plan 9. <small>(June 16, 2000)</small>
http://linuxtoday.com/news_story.php3?ltsn=2000-06-18-005-04-NW-SW

Plan 9 from Bell Labs - Wikipedia article about Plan 9.
http://en.wikipedia.org/wiki/Plan_9_from_Bell_Labs

The 9term Terminal Emulator - X terminal emulator that mimics the Plan 9 terminal.
http://www.cs.su.oz.au/~matty/9term/index.html

Plan 9: The Way the Future Was - Essay compares Plan 9 to Unix, parts of Plan 9 being implemented in Unix. From Eric S. Raymond's book The Art of Unix Programming. <small>(2003)</small>
http://www.faqs.org/docs/artu/plan9.html

Vita Nuova Holdings Ltd. - Lead distributor for Plan 9 and Inferno OSs.
http://www.vitanuova.com/plan9/main.html

Tokyo Inferno/Plan 9 Users Group - Offers free accounts on public Plan 9 servers, documentation (some in Japanese), mirrors of Plan 9 software, and other resources.
http://www.tip9ug.jp/en/index.html

Contrib Index - Index of software packages part of the 'Contrib' directory in the Bell Labs Sources repository.
http://plan9.bell-labs.com/wiki/plan9/Contrib_index/

Plan 9 2nd Edition ReadMe by Brian W. Kernighan - General introduction to the system.
http://doc.cat-v.org/plan_9/2nd_edition/README

Upas - A Simpler Approach to Metwork Mail - Essay on the mail interface system by David L. Presotto. Available in PDF and PostScript format.
http://doc.cat-v.org/bell_labs/upas_mail_system/

Plan 9 at the Advanced Computing Laboratory - Documentation, tips, various software packages including ports of Unix software, and extra drivers for 3rd Edition. <small>(April 21, 2003)</small>
http://mirtchovski.com/lanlp9/