Hi HN,
I made this. It started as a weekly reading project with my mother: one Federalist paper a week. I couldn't find an online edition that was actually pleasant to read - most are walls of text or scanned PDFs - so I built one.
It's all 85 essays with the original wording (text from the Project Gutenberg edition, publication dates checked against the Library of Congress record and Founders Online), set the way they first appeared: as essays in the New York newspapers of 1787–88, under the pen name "Publius." There's also a clean modern reading mode if the facsimile isn't your thing.
The part this crowd might like: the justified text uses Knuth–Plass line-breaking (via a small library called justif - which I found here on HN!), with hanging punctuation and optical margin alignment, set in the IM Fell types. No ads, no accounts, no tracking; reading progress is stored locally on your own device.
It's free and the text is public domain. I'd genuinely welcome feedback on the reading experience.
(It was recently featured on kottke.org, which is the only reason I'm brave enough to post it here.)