"1) Shopify 2) Groupon 3) Github 4) Heroku 5) Scribd 6) Crunchbase 7) Bloomberg 8) Indiegogo 9) Airbnb 10) Soundcloud 11) Bleacher Report 12) Square 13) Zendesk 14) Hulu 15) Slideshare 16) Yellowpages"

ProductHunt.com is also a Rails app by a reply comment.

_Another comment added 5 links and then 7 others. All were dupes of the first comment though_

--

Basecamp.com obviously, along with HighriseHQ.com I assume and their boards if that is still around along with CampfireNow.com and the now dead Backpackit.com (nooooo!).

But Campfire is basically dead too now, so really just Basecamp and Highrise (since it is a semi-independent subsidiary) can be added.

So 19 sites. #toread #pub