2020-07-07 [☆] https://humungus.tedunangst.com/r/gruss
rss

2012-02-21 [☆] Tiny Tiny RSS redmine
rss atom feed

2012-02-21 [☆] NewsBlur: The Open Source Feed Reader with Brains
rss atom feed

2011-10-24 [☆] rsslounge aggregator is a free web based rss feed reader
Alas, SQL & PHP
rss feed

2008-12-18 [☆] Chris's Wiki :: blog/tech/AtomVsRSS
Has links.
html xml atom feed rss