If you need the vanilla software's features, trying to decide between a server software for a vanilla server is hard, there are many forks claiming to be the best. If you don't need any plugins on your server you can use a Fabric server with server-side optimization mods. The most commonly used vanilla software with plugin support is SpigotMC and its forks, PaperMC, Purpur etc. Another popular vanilla software... Source: over 2 years ago

Use Paper for your server jar, not craftbukkit or spigot. Or if you need even more performance, use Purpur, as it has even more powerful customization options and performance patches; the company I work for as a plugin dev and server admin uses Purpur on our servers. Both of these server jars are fully compatible with Spigot plugins except in extremely rare cases where plugin developers are doing bad things, so... Source: over 2 years ago

This is the best I've found so far. https://deckofcards.net. Source: about 1 year ago

What about a shared deck of cards on everybody's phone? https://deckofcards.net/. Source: over 1 year ago

Someone posted this a bit ago and it looks pretty good Https://deckofcards.net. Source: almost 2 years ago

This looks really cool. I'd definitely love to have this on Android, as the other offerings lose their decks when closed. The best solution I could find is https://deckofcards.net. It just closes the rooms after 30 days inactivity. Source: almost 2 years ago