One I made up.

I call it Grid, but I don't know if that name is taken already.

Here's how it's played.

Shuffle the deck and put it on the table between the two players (more players are possible, but it's probably less fun the more players you have).

Take 8 cards from the deck and place them all around the deck, like this, face up:

XXX
XDX
XXX

Where D is the deck. The deck is face down.

Take two cards off the deck and give one to each player, face up.

The two players alternate turns. On a turn, you can do one of two things.

1) You can pick up one of the 8 cards/stacks around the deck and put it on top of another one, face up, IFF the top card on the stack you're moving matches the top card on the stack you're putting on top of, in either suit or number (number meaning 1, 2, 3, etc., J, K, etc.). Repeat as many times as desired. Often you can reduce it all to one stack in if you wish in one turn.

OR

2) You can pick up one of those stacks and put it on top of your personal card/stack IFF the top card on the stack matches your own top card in suit or number.

After you do 1 or 2, take a card off the deck for each of the 8 stacks/cards you removed and put it there face up, so there's again 8 stacks/cards surrounding the deck.

Keep playing until the deck is empty and the 8 cards/stacks around it are empty or at least no further moves can be made. The goal is to have the highest number of cards an your personal stack.

The strategies involved may not be obvious just from reading the instructions, but they'd probably occur to you if you started playing it. Strategies such as you could make a pile as big as possible so you can take it on your next turn (making the top card match your top card), but the bigger you make it the more cards will be replaced on the slots you picked up that the other player could use to change the top card on the stack and block you from getting it or even make it match their card, so you may want to limit how many stacks around the deck you remove.