| American Pencil Collectors Society: An organization of pen and pencil collectors from the USA and around the world. A brief history, description, and membership information. |
| International Fountain Pen Club: For collectors of the Italian Omas fountain pens, and other pens, with features and benefits of membership. Both English and Italian versions are available. |
| International Omas Pen Collectors Club: Official home for the Italian Omas collectors. Both English and Italian versions are available. |
| Michigan Pen Collectors: A collectors club with newsletter, pen show calendar, membership information, and links to other pen sites. |
| New York City Pen Show: Features an international event for collectors, dealers and manufacturers with exhibits, sales, and demonstrations. Held in September. |
| Pen Collectors of America: A non-profit organization to promote interest in fountain pens and pen collecting, and the history, manufacture and use of writing instruments. |
| Society Of Inkwell Collectors: Dedicated to establishing and enhancing the hobby of collecting inkwells and writing accessories. Provides its members with an opportunity to meet, communicate, and share information with inkwell collectors worldwide. |
| Writing Equipment Society: An organization devoted to the conservation, study, and collection of writing instruments and accessories. Includes articles about pens and pencils, and club information. |
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