molly-brown is a full-featured gemini server maintained by solderpunk, an active member of the gemini community.
By running your own gemini-server, you can self-host gemlogs (gemini blogs) and help others to do so too, under your own terms. It basically allows you to become an electronic publishing house.
The Gemini Project
List of Gemini Servers
To browse gemini-space you need a gemini compliant browser, for example
Or you could try using a portal, if you don't want to install anything: