Spartan is a nice, lightweight document transfer protocol that removes some of Gemini's fluff while retaining the ability to use gemtext markup and its niceties.
It also doesn't require a TLS certificate to function properly. While this makes the protocol a little less secure, it makes up for it by reducing the amount of complexity when hosting and maintaining a site.
You can learn more about spartan by going to the protocol author's gemini page [1].
[1] gemini://spartan.mozz.us