If you're asking about cursors on personal websites, I use multiple pngs for different pages and some javascript I found online for the motion effects.
If you're asking about in my day to day life, I just use one of the default cursors, Bibata Original Classic. I do have some fancier cursors downloaded, like one that looks like a sword called Katana, or this shiny Emerald Green one called "Chicago 95 Emerald Green." But I find that if I use a cursor that isn't preinstalled, certain flatpaks like Plex will have trouble detecting it and moving my cursor.