The Ruby Toolbox - Know your options!

rails-erd

1.81
Automatically generate an entity-relationship diagram (ERD) for your Rails models.
 Popularity
Downloads
2,989,541
Stars
2,447
Forks
257
Watchers
43

railroady

1.03
Ruby on Rails 3/4/5 model and controller UML class diagram generator. Originally based on the 'railroad' plugin and contributions of many others. (`brew install graphviz` before use!)
 Popularity
Downloads
1,531,811
Stars
1,576
Forks
138
Watchers
42