diff --git a/Ruby/README.markdown b/Ruby/README.markdown
index 5f11fca..24e2e85 100644
--- a/Ruby/README.markdown
+++ b/Ruby/README.markdown
@@ -25,7 +25,11 @@ TerminalNotifier.notify('Hello World', :activate => 'com.apple.Safari')
 TerminalNotifier.notify('Hello World', :open => 'http://twitter.com/alloy')
 TerminalNotifier.notify('Hello World', :execute => 'say "OMG"')
 TerminalNotifier.notify('Hello World', :group => Process.pid)
-TerminalNotifier.remove('previous Process.pid')
+
+TerminalNotifier.remove(Process.pid)
+
+TerminalNotifier.list(Process.pid)
+TerminalNotifier.list
 ```
 
 
diff --git a/Ruby/lib/terminal-notifier.rb b/Ruby/lib/terminal-notifier.rb
index 40512ba..a9f65c8 100644
--- a/Ruby/lib/terminal-notifier.rb
+++ b/Ruby/lib/terminal-notifier.rb
@@ -69,4 +69,34 @@ def verbose_remove(group)
     TerminalNotifier.execute_with_options(:remove => group)
   end
   module_function :verbose_remove
+
+  # If a ‘group’ ID is given, and a notification for that group exists,
+  # returns a hash with details about the notification.
+  #
+  # If no ‘group’ ID is given, an array of hashes describing all
+  # notifications.
+  #
+  # If no information is available this will return `nil`.
+  def list(group = :all)
+    TerminalNotifier.silence_stdout { TerminalNotifier.verbose_list(group) }
+  end
+  module_function :list
+
+  LIST_FIELDS = [:group, :title, :subtitle, :message, :delivered_at].freeze
+
+  # The same as `list`, but sends the output from the tool to STDOUT.
+  def verbose_list(group = :all)
+    output = TerminalNotifier.execute_with_options(:list => (group == :all ? 'ALL' : group))
+    return if output.strip.empty?
+
+    notifications = output.split("\n")[1..-1].map do |line|
+      LIST_FIELDS.zip(line.split("\t")).inject({}) do |hash, (key, value)|
+        hash[key] = key == :delivered_at ? Time.parse(value) : (value unless value == '(null)')
+        hash
+      end
+    end
+
+    group == :all ? notifications : notifications.first
+  end
+  module_function :verbose_list
 end
diff --git a/Ruby/spec/terminal-notifier_spec.rb b/Ruby/spec/terminal-notifier_spec.rb
index b13298f..2bee4f4 100644
--- a/Ruby/spec/terminal-notifier_spec.rb
+++ b/Ruby/spec/terminal-notifier_spec.rb
@@ -1,3 +1,4 @@
+require 'time'
 require 'rubygems'
 require 'bacon'
 require 'mocha'
@@ -28,4 +29,39 @@
     TerminalNotifier.expects(:execute_with_options).with(:remove => 'important stuff')
     TerminalNotifier.remove('important stuff')
   end
+
+  it "returns `nil` if no notification was found to list info for" do
+    TerminalNotifier.expects(:execute_with_options).with(:list => 'important stuff').returns('')
+    TerminalNotifier.list('important stuff').should == nil
+  end
+
+  it "returns info about a notification posted in a specific group" do
+    TerminalNotifier.expects(:execute_with_options).with(:list => 'important stuff').
+      returns("GroupID\tTitle\tSubtitle\tMessage\tDelivered At\n" \
+              "important stuff\tTerminal\t(null)\tExecute: rake spec\t2012-08-06 19:45:30 +0000")
+    TerminalNotifier.list('important stuff').should == {
+      :group => 'important stuff',
+      :title => 'Terminal', :subtitle => nil, :message => 'Execute: rake spec',
+      :delivered_at => Time.parse('2012-08-06 19:45:30 +0000')
+    }
+  end
+
+  it "by default returns a list of all notification" do
+    TerminalNotifier.expects(:execute_with_options).with(:list => 'ALL').
+      returns("GroupID\tTitle\tSubtitle\tMessage\tDelivered At\n" \
+              "important stuff\tTerminal\t(null)\tExecute: rake spec\t2012-08-06 19:45:30 +0000\n" \
+              "(null)\t(null)\tSubtle\tBe subtle!\t2012-08-07 19:45:30 +0000")
+    TerminalNotifier.list.should == [
+      {
+        :group => 'important stuff',
+        :title => 'Terminal', :subtitle => nil, :message => 'Execute: rake spec',
+        :delivered_at => Time.parse('2012-08-06 19:45:30 +0000')
+      },
+      {
+        :group => nil,
+        :title => nil, :subtitle => 'Subtle', :message => 'Be subtle!',
+        :delivered_at => Time.parse('2012-08-07 19:45:30 +0000')
+      }
+    ]
+  end
 end
diff --git a/Terminal Notifier.xcodeproj/xcshareddata/xcschemes/Terminal Notifier.xcscheme b/Terminal Notifier.xcodeproj/xcshareddata/xcschemes/Terminal Notifier.xcscheme
index 2dba179..c746d11 100644
--- a/Terminal Notifier.xcodeproj/xcshareddata/xcschemes/Terminal Notifier.xcscheme	
+++ b/Terminal Notifier.xcodeproj/xcshareddata/xcschemes/Terminal Notifier.xcscheme	
@@ -92,7 +92,7 @@
          </CommandLineArgument>
          <CommandLineArgument
             argument = "-message &apos;Execute: rake spec&apos;"
-            isEnabled = "NO">
+            isEnabled = "YES">
          </CommandLineArgument>
          <CommandLineArgument
             argument = "-activate com.apple.Safari"