Browser plugins

=> dillo-gemini, a Gemini plugin for the Dillo browser | cute-gemini, a Gemini userscript for Qutebrowser

Syntax highlighting for editors

=> text/gemini syntax highlighting for emacs | text/gemini syntax highlighting for kakoune | text/gemini syntax highlighting for nano | text/gemini syntax highlighting for vim

CGI applications

=> gemlikes, a liking and commenting system | git.gmi, a Gemini git frontend | Twinwiki, a Gemini wiki edited with sed commands

Feeds, Atom generators and aggregators

=> Atomini, a Ruby script to generate an Atom feed from a Gemini map | CAPCOM, an Atom feed aggregator that outputs text/gemini | Gemfeed, a tool to generate Atom feeds for a directory of text/gemini files | GMIToAtomFeed, a CGI tool to produce Atom feeds from Gemini index pages | Spacewalk, a moku-pona style aggregator for Gemini

Converters and parsers

=> gmi, a text/gemini parsing library | gemini-to-html, a simple Node JS module to convert text/gemini to HTML | html2gmi, a commandline application to convert HTML to GMI | html2gemini, a Go package to convert HTML to GMI | md2gemini, a Markdown to text/gemini converter

Other

=> Agena, a Gemini-to-Gopher proxy | Gemgit, a tool to generate static Gemini pages for git repos | gemini-fetch, a simple Node JS module to fetch Gemini content | Gig, a Gemini application framework in Go | Vostok, a protocol-agnostic framework supporting Gemini