What are the best Ruby projects according to HackerNews?

mal
40 comments
asdf
31 comments
homebrew-bundle
14 comments
graal
11 comments
truffleruby
11 comments
discourse
11 comments
open-location-code
10 comments
lobsters
10 comments
good_job
8 comments
falcon
8 comments
rack
7 comments
capistrano
7 comments
rake
6 comments
jekyll
6 comments
concurrent-ruby
6 comments
scientist
5 comments
artichoke
5 comments
tapioca
5 comments
brew
5 comments
spec
4 comments
devise
4 comments
jekyll-feed
4 comments
vagrant
4 comments
postal
4 comments
app-servers
3 comments
open-source-mac-os-apps
3 comments
rbs
3 comments