Ticket2write
Yahoo club for writers, poets, illustrators and publishing industry professionals united to market and publish works.
http://groups.yahoo.com/group/ticket2write/

The Writers Writing from Home Forum
Forum for aspiring or published writers with writer problems.
http://writers-bbs.com/forums/

RealityFuel
It's more than just a portal site for online journallers and fiction writers. Also includes journal prompts, collaborative writing projects, journal spotlights and a fun place to play.
http://www.realityfuel.org

Writing and Publishing Club
Forum for writers, editors, and publishers to discuss markets, writing, and support writers.
http://groups.yahoo.com/group/writingandpublishing/

Writers in Touch
A forum for writers to give and receive feedback on each other's work.
http://www.writersintouch.com/

WritersBBS
Writing forums in every category, including young adults (teen) poetry, critique, short fiction, script, tips. Join for free.
http://www.writersbbs.com/

Tribe: Creative Writing
Writing community with discussion boards.
http://creativewriting.tribe.net/

Tribe: Writers Out There?
Community with discussion boards for writers.
http://writerlyways.tribe.net/

Tribe: Writers' Rebellion
Creative writing forum where the members critique each other.
http://writersrebellion.tribe.net/

Strange Observations
A place for writers to discuss their kooky, beautiful, absurd, disturbing observations about the world they live in. Let's freak each other out, have fun and inspire.
http://strangeobservations.tribe.net/

WritingForums.com
Forum for writers to discuss the writing craft, post stories, and meet other writers. Writing advice and market listings.
http://www.writingforums.com

Tribe: Underground Words
Zines, journals, books, magazines, spoken word- words are magic. Discussions about writing and how we use words.
http://undergroundwords.tribe.net/

Writers' Dock
A free writers' community. Join in with group projects, competitions and activities, with the support of moderators and published writers.
http://www.writersdock.co.uk

The Eclectic Writer
Articles about writing and getting published. A message board and newsletter too.
http://www.eclectics.com/writing/writing.html

The Writers Hangout
A place for discussion of writing. Writers can also share writing regardless of skill level.
http://www.writershangout.com/

EveryAuthor.com's Untitled Forum
A creative writing community. The writer's forums include sections for various levels of ability, flash fiction, and challenges.
http://www.everyauthor.com/forum/

Forum Novels
Devoted to helping young or emerging writers, photographers, poets, and artists improve their talents and get opinions on how they can get better.
http://www.digitalmight.com

Word Trip
Community site for writers. Discussion in forums.
http://www.wordtrip.com

Universal Writers Group
Forum on MSN. Includes posts from fiction and non-fiction essay writers.
http://groups.msn.com/UniversalWritersGroup

Mamaphonic
Writing resource and discussion board for Mothers.
http://www.mamaphonic.com/forum

FictionPost.com
A community forum where writers can unite to share their work.
http://www.fictionpost.com/forums/

Unknown Writers
An online community of writers from around the world.
http://www.unknownwriters.net

Born 2 Write
Group message board with caring and experienced members. Also have resources in files and links sections which are helpful to aspiring writers.
http://groups.yahoo.com/group/born2write/

Writer's Beat
A community dedicated to the entire spectrum of writing.
http://www.writersbeat.com

A Writer's Desk
Writing lessons for creative fiction, a glossary of terms for writers, a listing of markets accepting freelances, and forum of writers.
http://twighlightmanor.proboards100.com/index.cgi

International Writers' Guild
A forum for writers of all kinds, intended for support, help with research, critiquing and everything else a writer might need while working. Primarily intended for paranormal romance writers, we have plenty of other sections for nearly every genre you can think of.
http://s14.invisionfree.com/I_W_G/

The Writing Bridge
Writing community in a forum. Membership must be applied for.
http://www.thewritingbridge.org

A Port In The Storm For Friends and Writers
A writing group for friends and writers alike. Encouraging each to do their best.
http://groups.msn.com/APortInTheStormForFriendsandWriters/

The Writer's Niche
MSN message boards for writers.
http://groups.msn.com/TheWritersNiche/

MoreWriting
A meeting place where you can develop your writing skills. Messageboards sorted by writing genre.
http://www.morewriting.co.uk

Tribe:The Artist's Way
A tribe for those who are interested in "The Artist's Way" as a process for streamlining and motivating your creative endeavors.
http://theartistsway.tribe.net/

Stumble Upon: Writing/ Writers
Group for writers to post to a forum and exchange useful or creative links they find online.
http://writingwriters.group.stumbleupon.com/

Stumble Upon: Writer's Lounge
Group with resources for writers and publishers. Book binding, e-publishing, self publishing included.
http://writers-lounge.group.stumbleupon.com/

Author Co-op (ACO)
Online community for authors worldwide. Presenting memberships, forums, listings for authors, promotions for authors.
http://www.freewebs.com/authorco-op/

WritersCafe.org
An online community for writers. Create your own author profile, post your writing, get reviews, join writing groups, and befriend other authors.
http://www.writerscafe.org/

Tribe: Writers Resource
Inspiration, advice or just another warm body facing the same blank computer screen. A place to come when cold coffee and nagging deadlines aren't enough to keep you going.
http://writersresource.tribe.net/

Writing Forum
A forum dedicated to writing. Forums for the ezine, contests, interviews, bookstore and writing discussion.
http://www.writingforums.org

The Slush Pile
A free, online writing workshop for writers of fiction or non-fiction, poetry or prose.
http://slushpile.freehostia.com

Literary Den
A community of enthusiastic readers and budding writers.
http://www.literaryden.co.uk

Flickr: Writers
A place for writers of all kinds. Message boards for photos/ graphic art and writing discussion.
http://www.flickr.com/groups/35468156202@N01/

Authors United
An online community for writers of all ages, from all around the world. Share your work and writing advice with fellow writers.
http://z3.invisionfree.com/Authors_United/