The Slot: A Spot for Copy Editors
Overview of newspaper copy editing and style points from a Washington Post copy editor.
http://www.theslot.com/

American Copy Editors Society
Focus on journalism. Membership, conference and contest information, as well as training, job and internship listings, discussion group and advice.
http://www.copydesk.org/

Copy Editing for Magazines
A course syllabus in magazine copy editing and other information about the profession by Mindy McAdams.
http://www.well.com/user/mmcadams/copy.editing.html

How to Edit Your Own Writing
Detailed 11-point self-editing checklist.
http://home.earthlink.net/~jdc24/selfEdit.htm

Testy Copy Editors
Message board geared toward newspaper copy editing.
http://testycopyeditors.org

Yahoo Groups: Copy Editors
Discussion group for copy editors in journalism.
http://groups.yahoo.com/group/copyeditors/

Yahoo Groups: Copy Desk Cafe
Discussion group for those working in print journalism.
http://groups.yahoo.com/group/copydeskcafe/

Edit-Work.com
Guidelines for creating a style for the company web site, and for editorial procedures. Gives the big picture for content managers.
http://www.edit-work.com/

National Fellowships for Copy Editors
Information on midcareer fellowships, including lists of previous fellows and conference materials.
http://www.ibiblio.org/copyed/

EServer TC Library: Editing
A collection of over 150 online resources about editing, indexing and copy editing, annotated and rated by professional writers.
http://tc.eserver.org/dir/Editing

Copy-Editing Corner
For copy editors to gather and discuss topics.
http://copyeditingcorner.blogspot.com/

Copy Editor
Language newsletter, website and job search for copy editors.
http://www.copyeditor.com/

The John Bremner Editing Test
Quiz with answer key from the legendary University of Kansas professor.
http://www.ku.edu/~jschool/school/bremnertest.shtml

e-Editor Blog
UK-based guide to writing and editing better, with tips, training and practical help.
http://e-editor.blogspot.com

A Capital Idea
This copyediting blog covers grammar and newspapers like they're going out of style.
http://nstockdale.blogspot.com

Copy Massage
A twentysomething copy editor muses on the copy, the editing and the quirky rules that make folks despise us.
http://copymassage.blogspot.com/

Association of Art Editors
A national group whose members exchange information about editorial practices, standards, and job opportunities, both freelance and institutional.
http://www.artedit.org

Bay Area Editors Forum
An association of in-house and freelance editors from a variety of publishing and publications settings. It helps employers and contractors find just the right editor. Also helps editors strengthen their skills, contacts, and awareness of professional opportunities.
http://www.editorsforum.org/

Editorial Freelancers Association
A national nonprofit professional organization of self-employed workers in the publishing and communications industries. Members include editors, writers, indexers, proofreaders, researchers, desktop publishers, and translators.
http://www.the-efa.org/

Copyediting-L (CE-L)
Copyediting List at Indiana University. A list for copy editors and other defenders of the English language. Listserv archives, information on how to join, FAQs, photo album, and resources.
http://www.copyediting-l.info/

Suite101: Editing & Publishing
A guide to editing and getting published.
http://editingpublishing.suite101.com/

Society of Editors (NSW)
A society of freelance and in-house editors working in a range of situations in book, journal and magazine publishing both print and electronic.
http://www.editorsnsw.com/

Society for Editors and Proofreaders
A professional organization based in the UK for editors and proofreaders. To promote high editorial standards.
http://www.sfep.org.uk/