Gemini is a new application-level internet protocol for the distribution of arbitrary files, with some special consideration for serving a lightweight hypertext format which facilitates linking between files. You may think of Gemini as "the web, stripped right back to its essence" or as "Gopher, souped up and modernised a little", depending upon your perspective. ...

Project Gemini FAQ (link added)

See also

  • Gopher — Gemini is like Gopher with TLS
  • twtxt.tcl — contains a very basic pure-Tcl Gemini client