Updated july 2003

Message Boards:
PenTrace - Pen message board and sale board.

Collector's sites:

Parker 75 - Top Parker 75 online reference!
Acme Studios - New pens with a little more pizzazz
Wet Inc Pens - Specializing in Parker 51s
Pen World - Fountain Pen Magazine
Pen Lovers - The home of Stylophiles
Great Pen Stores - Glenn Marcus' Pen Site
Inkpen - Joel Hamilton's Pen SiteLevenger - Tools For Serious Readers
Penoply - For those in need of a quick history lesson
Pendemonium - When I need "pen stuff" I check here first
Swisher Pens - Chuck carries many of the major new pen brands
Thompson Pens - Chris Thompson makes the BEST replica Duofolds ever, period!
Max
Battsea Pen Home - There is always something of interest here

Richard Binders Pen Page - Nice site with great photos and information.
Pete Kirby - This is a new web site that has great potential. Look for some great things here.

Esterbrook: Hans Presto - Great page on Esterbrook pens and nibs.
Esterbrook Pen Page - Best place to get information on Esterbrook pens.

Parker 51 Pen Page - Everything that you want to know about Parker 51 pens.
Parker 75 Pen Page - The definitive site for Parker 75s.
Vacumania.com - David Isaacson page mainly devoted to Parker Vacumatics.

PaulWirt.com - A great web site that covers everything related to the Paul Wirt pen company.

Pen And Co - French site available in French and English. Modern and vintage pens.

Sheaffer Flat Tops - Roger Wooten's web page on Sheaffers. Also sells some of the best pen catalog copies around

Pelikan: The PENguin - One of the best sources of pen information around. Lots of information on Pelikan pens site.
Pelikan-Guide - The definitive Pelikan pen site.

Scripto: Pencils - Great site covering Scripto pencils

Clubs:
Pen Collectors of America - Membership information and show information
Michigan Pen Collectors - Web site for the club and for details on the Michigan Pen Show.

Official sites:

Alfred Dunhill
Ancora
Aurora
Bexley
Caran D'Ache
Cartier
Classic Pens
Columbus
Conklin Pen
Conway Stewart
A.T. Cross
Curtis Australia
David Oscarson
Delta
Diplomat
S.T. Dupont
Faber Castell
Jörg Hysek
Krone
Laban
Lalex
Lamy
LeBoeuf
Marlen
MacKinnon
Montblanc
Montegrappa
Omas
Onoto
Parker
Pelikan
Platignum
Recife
Retro 1951
Rotring
Sailor
Sheaffer
Signum
Stipula
Taccia
Think
Tibaldi
Tombow
Visconti
Waterford
Waterman
Yafa
Yard-O-Led

Vintage pens for sale:
Pendemonium - One of the great sites. Pens, inks, books, and just about everything else. Highly recommended.
Pen Trace - Very popular message board.
The Fountain Pen Hospital in New York - This is an all round pen shop that has old pens, new pens, books, and supplies.
C S Classic Pens - New and vintage pens for sale.
Southern Scribe - Rick Horne's Web page. Nice selection of vintage and modern pens. One of the best repairmen around!!! 
Andy's Pens - Nice site with good information. Sells vintage pens and modern Conway Stewart pens.
SpeerBob - Nice site that mainly covers modern pens but has a little of everything.
Cathedral Pens - Nice source for modern and vintage pens, books, and ephemera.
Pentiques.com - Distinctive pens - Expert Restoration - Great site.
Battersea Pen Home - Simon Gray and Sean Lovell - vintage pens for sale
Bonham's Auction House - Various auctions including fountain pens
David Nishimura Pen Page - Vintage pens for sale, repairs and cost. This site has a lot of good pen information!
WriteTime - Well done site. Lots of vintage pens for sale.
1001 Pens - Max Davis site for vintage pens and parts
Ron Felman's Penrescue - Vintage pens, repairs, and service.
Gary Lehrer Pen Page - Great selection of vintage pens.
June's Antique Deskstuff - Vintage pens, Inkwells, and Institutional Inkwells.
PenBox.com - Vintage pens pencils inkwells and accessories.
Jerry Burtons Pen Page - Nice assortment of restored vintage pens for sale.
Esterbrook Pens Online - Wide selection on vintage pens and accessories.
GLKPens - Gary Kaplan web page offering high end vintage pens. 
Jon's Vintage Pens - Nice selection on vintage pens along with a number of modern pens.
FiveStarPens - Old time collector dealer now has a web page. Pens, parts, ephemera.

Modern pens for sale:
Susanna Buffo's Visconti Page - Visconti pens and information
Stipula Pen Page - Stipula pens for sale.
Arthur Brown & Bro. International Pen Shop - Great site offering discount prices on most modern pens.
Nakaya Fountain Pen Co - A maker of fine hand-made customized pens, a small Japanese company.
World Lux Pens - Fine selection of modern pens at discounted prices.
Pen Designs - Custom made pens made of wood and deer antler
MacKinnon Pens - Manufacturer and dealer in limited edition fountain pens.
Swisher Pens - Great site by Chuck Swisher and Chun Lee. Wide selection of modern pens.
Fountain Pen Heaven - Get Online Discounts on Fine Writing Pens From Leading Retailers
The Pen Zone UK - Large range of Cross, Parker, Waterman, Sheaffer and Space Pens and watches.
Fountain Pen Studios - Selection of pens made by Ryan Krusac.
Pen Heaven London - Good selection of modern pens
 J M Pennifeather Fountain Pens – A website and pen store selling a wide selection of designer pens from major brands.

Repairs:
John Mottishaw - For nib repair, this is the place. Check it out!
The Pen Sac Company - The original source for replacement ink sacs and diaphragms.