This page contains links to websites that I consider interesting to stamp collectors.
They are in English, unless otherwise indicated with a flag picture, e.g. Dutch: .

Feel free to .

What you will not find here:

• Generic resources like translation sites, (historical) maps, dictionaries, picture upload sites
• Stamps for specific countries, periods, events
• Auction, vendor, club and forum sites
• Software, paper catalogues

Sections:
Stamp collecting general
Sites that help in identifying stamps
Fakes, forgeries, other 'stamps'
Techniques and knowledge (production)
Techniques and knowledge (collecting)
Machins
Swapping
Auctions and finance
Other

Date of last update: 29 mar 2016

Youtube videos are marked with

Wikipedia is (of course) a very good place to look up (any) stamp information. Start with the postage stamp page and follow the links from there, or enter your search term.
I have included some major Wikipedia links on this page.
If you are looking for information about stamps from specific countries, do not forget to go to the Wikipedia language version of that country. As an example: searching for the "Schwarze(r) Einser" stamp on the English site will bring you to a one-screen long English page, but doing the same on the German site gives you 4 times as much information (if you can read German, of course).