CAPCOM is an atom feed aggregator for gemini
Antenna feed aggregator (no need for atom.xml)
Here's the feed log for Antenna (helps in debugging why your log doesn't show up):
Geddit is another feed for gemini pages (an interactive link service, with comments)
Geminews
It's possible to list backlinks with this url:
gemini://geminispace.info/backlinks?envs.net/~seeg/
smolZINE is a small gemzine
The Treeblue Review curates themed feeds and lists of links aggregated from across Geminispace.