diff --git a/app/controllers/public/comment_controller.rb b/app/controllers/public/comment_controller.rb
index 1b436c4..37bc0b3 100644
--- a/app/controllers/public/comment_controller.rb
+++ b/app/controllers/public/comment_controller.rb
@@ -71,7 +71,9 @@ class CommentController < ApplicationController
       return
     end
 
-    @comment.save
+    if @comment.save
+      @plugins.dispatch(:process_extra_comment_params, [@comment,params])
+    end
 
     respond_to do |format|
       format.js do
@@ -113,6 +115,8 @@ class CommentController < ApplicationController
 
   def update
     if @comment.update_attributes(params[:comment])
+      @plugins.dispatch(:process_extra_comment_params, [@comment,params])
+
       respond_to do |format|
         format.js do
           comment_to_render = @comment.comment_root
diff --git a/app/views/comment/_comment.rhtml b/app/views/comment/_comment.rhtml
index 645fd0e..9c67014 100644
--- a/app/views/comment/_comment.rhtml
+++ b/app/views/comment/_comment.rhtml
@@ -43,6 +43,7 @@
         <p/>
         <%= txt2html comment.body %>
       </div>
+      <%= @plugins.dispatch(:comment_extra_contents, local_assigns).collect { |content| instance_eval(&content) }.join("") %>
     </div>
 
     <div class="comment_reply post_comment_box closed" id="comment_reply_to_<%= comment.id %>">
diff --git a/lib/noosfero/plugin.rb b/lib/noosfero/plugin.rb
index 3bd7cf0..eed5ac5 100644
--- a/lib/noosfero/plugin.rb
+++ b/lib/noosfero/plugin.rb
@@ -442,6 +442,25 @@ class Noosfero::Plugin
     nil
   end
 
+  # -> Adds adittional content to comment visualization
+  # returns = lambda block that creates html code
+  def comment_extra_contents(args)
+    nil
+  end
+
+  # This method is called when the user clicks to send a comment.
+  # A plugin can add new content to comment form and this method can process the params sent to avoid creating field on core tables.
+  # returns = params after processed by plugins
+  # example:
+  #
+  #   def process_extra_comment_params(params)
+  #     params.delete(:extra_field)
+  #   end
+  #
+  def process_extra_comment_params(params)
+    params
+  end
+
   # -> Finds objects by their contents
   # returns = {:results => [a, b, c, ...], ...}
   # P.S.: The plugin might add other informations on the return hash for its
--
libgit2 0.21.2