A really great resource. My usual game reference, BoardGameGeek, has a lot of the same info ultimately, but if you just want purely standard card game info, this is much better organized and displayed.
Side note: Kind of funny that the site has Deutsch and English language options, but the cookie notice is in Italian. Anyone know why that is?
I enjoy some games played with rook cards (or numbered cards: 4 colored suites of 14 cards each):
https://www.pagat.com/kt5/rook.html
https://archive.org/details/rook-instruction-manual-1924-ima... (This actually has rules for more games than are found in its own table of contents.)
There are many, for different ages and effort levels. (And with minimal adaptation, the same cards can be used for games normally associated with standard playing card decks, or "go fish" for children, or whatever.)
You can play solitaire family games in exaequOS: https://exaequos.com/?a=/usr/games/csol
I love pagat.com and it is often used as an authority source of game rules. Related note: it links to my own card game that I created: https://luris.org
Is creating real money multiplayer versions of all these not a giant untapped opportunity? Cards and wagering are often a potent mix, yet only hold'em and rummy have gone in this direction for some reason
My go-to example of an ancient website that's still around and useful.
What are the best digital interfaces for playing card games in-person? They have to be good enough to convert people who love faffing about with physical cards (not me).
Some great indexes here. I often link https://www.pagat.com/class/
My favorite card came discovery in adult life was the climbing genre. Haggis, Tichu, Dou Dizhu
My second was learning about Cuttle and the timing of it/Magic the Gathering