Gem sextant, Gem to show routes without rake command
这个 Gem 不错，Sextant, https://github.com/schneems/sextant
加上这个 Gem 以后，可以通过 http://localhost:3000/rails/routes
来查看 Routes 了，比较方便，试试看
我安装后有错误：
/Users/shaneniu/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/activesupport-3.1.4/lib/active_support/dependencies.rb:240:in `require': cannot load such file -- rails/application/route_inspector (LoadError)
看了下 railties-3.1.4/lib 是没有 rails/application/route_inspector，只有 rails/application/route_reloader。