Any good terminal emulator has them. Personally I use Konsole, but I'd be remiss if I didn't mention Neovide which supports them as well. It's a bit like a terminal emulator that can only run Neovim and has some Neovim-specific settings and integration (e.g. change window opacity with a Vim command, animated scrolling, plus that funky little animated cursor effect you can see on the website), and as a bonus it supports Windows and MacOS ~~if you're a heathen~~