Moving this directory from the legacy forum.
Link to the original: Postcrossing (Legacy) Forum - DIRECTORY Handmade Cards and Mail Art
As they are widely spread and I’m not sure whether the people who are interested in them can find them easily, I’d like to make a list of links to every topic regarding handmade cards and mail art.
This is a WIKI! That means that we all can edit this post, add new topics or change broken links etc. But you can also post a comment and I’ll add new topics that you found.
I will also write a post for all new additions to this wiki and if you want to follow to see what’s new, you can just track or watch this topic and then you are notified by every new post.
Discussions
General
Do you make postcards by yourself?
Do your handmade cards also get more often lost on the way?
Handmade… Is this really a postcard?
“I’m not an artist!” 
(Yes, you are)
Is it considered as a postcard?
Post card artists
Sending A Disliked Card
What classes as a hand made card?
Where to buy handmade cards
Materials
Glue & adhesives for mailart
Handmade Stickers
Laminated cards
Sources for personalized stamps
Unique material and Unusual Postcard
What are your favorite medium(s) to use when creating your mail art/handmade cards?
What do you coat handmade postcards in to protect the design?
What do you make handmade cards out of?
Yarn on Handmade Cards?
Meeting cards (Discussions)
Designing Postcrossing Meeting Cards
Where to get a postcrossing meetup card？
Postcrossing rules and guidelines
How to make a postcard with “postcrossing” logo?
[QUESTION] The rule of the usage of word “Postcrossing”
Other
A question about making collages
First attempt at handmade card - help!
How to make postcards with perforated borders?
Postcards to colour
Sticker bombing on postcard
Trying to find a user
Printing
Etsy, Zazzle and Print-On-Demand Services
I Just bought 50 cards on Zazzle so you don’t have to!
Postcards on Zazzle
Printing your own postcards
Receiving MyPostcard Express cards - yay or nay?
Recycling
Cutting cardboard into postcards. What should I make?
Question for food box card collectors
Received a Postcard made from cardboard box
Recycling old calendar into postcards?
Up-cycling postcards
What are these food cards called?
Show us your mail art
Decorating Envelopes!
Decorating the back of your →NON-HANDMADE POSTCARDS←
Show us your handmade postcards and Mail Art
Would anyone be interested in this?
Turning greeting cards into postcards
Greeting Cards into Postcards?
Repurposing greeting cards into postcards?
Round Robins
How do Round Robins work?
Draw RR *NEW MEMBERS WELCOME*
Handmade RR
PHOTO RR - many themes
Professionally printed cards round robin!
Round Robins with certain groups for handmade cards or mail art
Any handmade cards
Handmade. Drawings, paintings, collages: https://community.postcrossing.com/t/mini-rr-send-2-receive-2/21111
Handmade cards: https://community.postcrossing.com/t/many-themes-rr-many-themes-to-choose-find-join-your-theme/1189
Handmade cards - Scandinavia & OC: https://community.postcrossing.com/t/scandinavia-x-other-countries-rr/635
Mail art postcard in general + commemorative stamps: https://community.postcrossing.com/t/cards-with-stamps-you-like-rr/625
Selffmade / handmade cards: 3 in 1 RR (3 unwritten cards in an envelope) - view and non view themes
The artist is you! Handmade cards only, every technique is accepted: https://community.postcrossing.com/t/art-rr/30569
Food package cards
Any card made of food packaging: https://community.postcrossing.com/t/food-drink-rr/1587
Food Package Cards: https://community.postcrossing.com/t/ad-card-rr/3577
Food package card Japan & OC: https://community.postcrossing.com/t/japan-other-countries-rr/1128
Maxicards
Self-made maxicard (written and stamped): https://community.postcrossing.com/t/cards-with-stamps-you-like-rr/625
Meeting cards
Cards from postcrossing meeting: https://community.postcrossing.com/t/different-countries-and-postal-series-rr-join-here-you-are-very-welcome/1609
Meeting postcards / remaining - leftover postcards: https://community.postcrossing.com/t/many-themes-rr-many-themes-to-choose-find-join-your-theme/1189
Meetup cards signed or unsigned but not sent: https://community.postcrossing.com/t/e-q-t-e-europe-only-quality-travelling-envelope-many-groups-open/1481
Meet-up offer groups: https://community.postcrossing.com/t/new-host-new-group-postcrossing-meet-up-rr/958
Photos
Photo cards - Photos of ships you have taken yourself: https://community.postcrossing.com/t/all-about-ships-and-boats-if-you-like-ships-welcome-aboard/2059
Your own photography. Pick your best shot and print it! Every handmade photo is accepted, please no nudes or erotic photos: https://community.postcrossing.com/t/art-rr/30569
STREET ART. Take a look around you and grab your camera! Since there aren’t so much postcards representing street art around the world, handmade cards are accepted. https://community.postcrossing.com/t/art-rr/30569
Recycling/Reusing
Cards made out of grocery lists / receipts / coupons: Food & Drink RR
Recycling: https://community.postcrossing.com/t/socially-good-cards-rr/284
Reused cards (several groups): https://community.postcrossing.com/t/scandinavia-x-other-countries-rr/635
Upcycled envelopes + commemorative stamps: https://community.postcrossing.com/t/cards-with-stamps-you-like-rr/625
Special subjects
Handmade LGBTQ+ related: Here you send cards that you made yourself, that are in any way LGBTQ+ related: LGBTQ+ RR 
Show your pride! Be an ally!
Hand made fantasy art card: https://community.postcrossing.com/t/dragons-nest-rr-all-about-fantasy-art-fairies-dragons-mermaids-unicorns-vampires-etc/6704
Handmade food & drink cards: Food & Drink RR
Holidays and festivals, several groups for homemade cards: Holidays & Festivals (HF RR) New Forum spot
Selfmade ships and boats cards (drawn ships, collages, etc.): https://community.postcrossing.com/t/all-about-ships-and-boats-if-you-like-ships-welcome-aboard/2059
North America category
Handmade, various themes: [RR] North America Themes Round Robin [NA Themes]
Tags
How do Tags work?
A PHOTO and a STORY tag
**ATC (Artist trading CARDS) tag**
Colourful handmade card tag
Draw a Picture on the Card Tag
Draw Me This Tag (List 10 Themes)
ETEGAMI tag (Handmade cards)
Favourite colour tag - Handmade cards
Food package postcard tag
Front of Greeting / Folded Card Tag
Handmade Card - Non-Handmade Card Tag
Handmade cards- Choose a subject tag
Handmade Offer Tag
Handmade Postcard Tag 
simple - easy - fun
Homemade Textile Crafted Card Tag
Mail Art Envelope Tag
Photograph tag
German language category: [TAG] Hand-Made-Card-Tag
Tags that explicitly allow you to send handmade cards
Christian Tag
Coloring Postcards Tag
Environmentally Friendly Tag
Gay / Lesbian / LGBT
Halloween tag
List Tag
MAXICARDS: You choose (Offer Tag)
MUSIC / MUSICALS / THEATRE / OPEN AIR CONCERTS/ FESTIVALS etc. tag
Rest of Meeting postcards tag (remaining meeting postcards) - Offer tag
Socially Good Cards Tag
Totally Weird Postcard Tag
Unusual Size or Shape Postcard Tag
Vehicles/Transportation Tag - any kind of vehicles, including traditional transportation
Yellow Tag
Your favorite song lyrics tag
German language category:
[TAG] Alles ist Kunst!
[TAG] Themen-Tag - Alles erlaubt!
Trades, Requests, Offers, Penpals, Lotteries
Lotteries/Freebies
https://community.postcrossing.com/t/lottery-handmade-card-hello-my-world/184804
https://community.postcrossing.com/t/handmade-card-apple/184801
Penpal ads
24/F/Sweden/NL –> looking for creative, bookish penpals!
30/F/USA creative pen pal wanted
34/F/USA - Looking for an international artsy penpal
35/F/Germany //New penpals// Music, (Mail)Art, Photography, Dance
Home made postcard penpal - Me: F/40/NL
Irish or creative penpal wanted
Projects
Spread Joy
Help with a gift - OFFER: Touristic Postcard from DUBAI, United Arab Emirates
Swaps: Handmade/mail art
ATC swaps for Advent calendar surprises
Cards of my aquarelle paintings
Cats for trade!
Creative postcard swap!
Designed by me postcards for swap
Does anyone want to exchange his/her handmade cards (drawings or paintings) for other cards?
Exchange unwritten postcards
Handmade cards and decorated envelopes
Handmade postcard collage of used stamps
Indian Tiger Themed Greeting Card + 3 Tiger Themed Postcards+ 1 Handmade Postcard
Mail Art
Newspaper collage made by my god daughter who’s 5
[OFFER] Colour Your Own Postcards
[OFFER] floral; bird stamp collage cards
Photo prints / snapshot trade?
Postcard made from Red Envelope
Postcard, with silver pendant trade
[request] front of Weetabix box postcard
[SWAP] 2 French homemade postcards
[SWAP] Baguette (Yes the bread) Movie Themed Postcards
Swap, different house cards
Swap, two aquarelle/quote cards
Swap - UK Stamp Postcards (hand made)
Three cat cards free for trade
Two cards of my paintings
[SWAP] Handmade card swap
Swaps: Materials for handmade/mail art
Damaged stamps for cards or duplicate!
Old/Vintage Paper Items for collages/mail art - I’ll send you postcards based on your wishes in return!
Used stamps
Swaps: Meeting cards
For Swap：Postcrossing Meet-Up Cards from China
Looking for signed meetup cards or maxicards
Melbourne meet up cards for swap
Meet-up Cards for Swap
New year meet up card
Offer: 3/21 Taiwan meetup card: Benedict Cumberbatch
[Offer] Apr.10 Chongqing Meetup Cards
[OFFER] Kunshan March Meet-up Cards
[OFFER] meet up cards in Hangzhou
[offer] meet up cards in Hangzhou(China) on March 21
Offer: Meetingcards for swap
Offer: Meetup Card from last World Postcard Day
OFFER: online Easter meetup 3 April 2021
[OFFER] Online Meetup Cards!
**OFFER: PT 2020 official meeting cards**
Postcrossing Meet-up Card Trade from China
Request: Meeting Cards
Request: Postcrossing meet-up postcards from original cities
[SWAP] Feb.28 Postcrossing Meetup cards
[Swap] Foshan meet up postcards in May & June
[Swap]Guangzhou March meet up Postcard
SWAP lots of Meetup postcards from Hefei,China
[SWAP] Mar.21 Postcrossing Meetup cards
[SWAP] Meeting cards virtually signed
[Swap] Meetup cards
[SWAP] spring Postcrossing Meetup cards cherry bloom, Easter
Travelling Notebooks
(included because most of them encourage creativity)
Homemade Textile Crafted Card Tag
It’s a win–win situation! I was happy when I noticed that tags hadn’t been implemented yet, for that meant that there was no excuse not to start a mail art directory in the new forum, too!
