This time I analysed 844 jam games with an Itch.io Link
I downloaded infos on all LD57 Jam games. Then tried to look for itch.io links in description or links. Here's how many I found:

These are the tools used to create these games according to "Made With" tag on Itch.io:

These are the most common Tags used:

Here's what platforms the games support:

We created our game for web only using a custom game editor we made in Three.js. Would love for you to check it out: Dungeon Cartographer
I also made a website to find random web games: https://rate-ludum-dare.alexandfinn.com