diff --git a/plugins/dspace/lib/dspace_plugin.rb b/plugins/dspace/lib/dspace_plugin.rb
new file mode 100644
index 0000000..1dfc482
--- /dev/null
+++ b/plugins/dspace/lib/dspace_plugin.rb
@@ -0,0 +1,21 @@
+class DspacePlugin < Noosfero::Plugin
+
+  def self.plugin_name
+      "Relevant Content Plugin"
+  end
+
+  def self.plugin_description
+    _("A plugin that lists the most accessed, most commented, most liked and most disliked contents.")
+  end
+
+  def self.extra_blocks
+    {
+     DspacePlugin::DspaceBlock => {}
+    }
+  end
+
+  def stylesheet?
+    true
+  end
+
+end
diff --git a/plugins/dspace/lib/dspace_plugin/dspace_block.rb b/plugins/dspace/lib/dspace_plugin/dspace_block.rb
new file mode 100644
index 0000000..2b3b6d2
--- /dev/null
+++ b/plugins/dspace/lib/dspace_plugin/dspace_block.rb
@@ -0,0 +1,97 @@
+class DspacePlugin::DspaceBlock < Block
+  def self.description
+    _('Dspace content')
+  end
+
+  def default_title
+      _('Dspace content')
+  end
+
+  def help
+    _('This block displays dspace content.')
+  end
+
+  settings_items :limit,                :type => :integer, :default => 5
+  settings_items :show_most_read,       :type => :boolean, :default => 1
+  settings_items :show_most_commented,  :type => :boolean, :default => 1
+  settings_items :show_most_liked,      :type => :boolean, :default => 1
+  settings_items :show_most_disliked,   :type => :boolean, :default => 0
+  settings_items :show_most_voted,      :type => :boolean, :default => 1
+
+  attr_accessible :limit, :show_most_voted, :show_most_disliked, :show_most_liked, :show_most_commented, :show_most_read
+
+  include ActionView::Helpers
+  include Rails.application.routes.url_helpers
+
+  def content(args={})
+
+    content = block_title(title)
+
+    if self.show_most_read
+      docs = Article.most_accessed(owner, self.limit)
+      if !docs.blank?
+        subcontent = ""
+        subcontent += content_tag(:span, _("Most read articles"), :class=>"title mread") + "\n"
+        subcontent += content_tag(:ul, docs.map {|item| content_tag('li', link_to(h(item.title), item.url))}.join("\n"))
+        content += content_tag(:div, subcontent, :class=>"block mread") + "\n"
+      end
+    end
+
+    if self.show_most_commented
+      docs = Article.most_commented_dspace(owner, self.limit)
+      if !docs.blank?
+        subcontent = ""
+        subcontent += content_tag(:span, _("Most commented articles"), :class=>"title mcommented") + "\n"
+        subcontent += content_tag(:ul, docs.map {|item| content_tag('li', link_to(h(item.title), item.url))}.join("\n"))
+        content += content_tag(:div, subcontent, :class=>"block mcommented") + "\n"
+      end
+    end
+
+    if owner.kind_of?(Environment)
+      env = owner
+    else
+      env =  owner.environment
+    end
+
+    if env.plugin_enabled?(VotePlugin)
+      if self.show_most_liked
+        docs = Article.more_positive_votes(owner, self.limit)
+        if !docs.blank?
+          subcontent = ""
+          subcontent += content_tag(:span, _("Most liked articles"), :class=>"title mliked") + "\n"
+          subcontent += content_tag(:ul, docs.map {|item| content_tag('li', link_to(h(item.title), item.url))}.join("\n"))
+          content += content_tag(:div, subcontent, :class=>"block mliked") + "\n"
+        end
+      end
+      if self.show_most_disliked
+        docs = Article.more_negative_votes(owner, self.limit)
+        if !docs.blank?
+          subcontent = ""
+          subcontent += content_tag(:span, _("Most disliked articles"), :class=>"title mdisliked") + "\n"
+          subcontent += content_tag(:ul, docs.map {|item| content_tag('li', link_to(h(item.title), item.url))}.join("\n"))
+          content += content_tag(:div, subcontent, :class=>"block mdisliked") + "\n"
+        end
+      end
+
+      if self.show_most_voted
+        docs = Article.most_voted(owner, self.limit)
+        if !docs.blank?
+          subcontent = ""
+          subcontent += content_tag(:span, _("Most voted articles"), :class=>"title mvoted") + "\n"
+          subcontent += content_tag(:ul, docs.map {|item| content_tag('li', link_to(h(item.title), item.url))}.join("\n"))
+          content += content_tag(:div, subcontent, :class=>"block mvoted") + "\n"
+        end
+      end
+    end
+    return content
+  end
+
+  def timeout
+    4.hours
+  end
+
+  def self.expire_on
+      { :profile => [:article], :environment => [:article] }
+  end
+
+end
diff --git a/plugins/dspace/lib/ext/article.rb b/plugins/dspace/lib/ext/article.rb
new file mode 100644
index 0000000..659fe60
--- /dev/null
+++ b/plugins/dspace/lib/ext/article.rb
@@ -0,0 +1,95 @@
+require_dependency 'article'
+
+class Article
+
+  scope :dspace, :conditions => ["articles.published = true and (articles.type != 'UploadedFile' and articles.type != 'Blog' and articles.type != 'RssFeed') OR articles.type is NULL"]
+
+  def self.articles_columns
+    Article.column_names.map {|c| "articles.#{c}"} .join(",")
+  end
+
+  def self.most_accessed(owner, limit = nil)
+    conditions = owner.kind_of?(Environment) ?  ["hits > 0"] : ["profile_id = ? and hits > 0", owner.id]
+    result = Article.dspace.find(
+      :all,
+      :order => 'hits desc',
+      :limit => limit,
+      :conditions => conditions)
+    result.paginate({:page => 1, :per_page => limit})
+  end
+
+  def self.most_commented_dspace(owner, limit)
+      conditions = owner.kind_of?(Environment) ? ["comments_count > 0"] : ["profile_id = ? and comments_count > 0", owner.id]
+      result = Article.dspace.find(
+        :all,
+        :order => 'comments_count desc',
+        :limit => limit,
+        :conditions => conditions)
+      result.paginate({:page => 1, :per_page => limit})
+  end
+
+  def self.more_positive_votes(owner, limit = nil)
+      conditions = owner.kind_of?(Environment) ? {'votes.voteable_type' => 'Article'} : ["profile_id = ? and votes.voteable_type = ? ", owner.id, 'Article']
+      result = Article.dspace.find(
+        :all,
+        :order => 'sum(vote) desc',
+        :group => 'voteable_id, ' + articles_columns,
+        :limit => limit,
+        :having => ['sum(vote) > 0'],
+        :conditions => conditions,
+        :joins => 'INNER JOIN votes ON articles.id = votes.voteable_id')
+      result.paginate({:page => 1, :per_page => limit})
+  end
+
+  def self.more_negative_votes(owner, limit = nil)
+      conditions = owner.kind_of?(Environment) ? {'votes.voteable_type' => 'Article'} : ["profile_id = ? and votes.voteable_type = 'Article' ", owner.id]
+      result = Article.dspace.find(
+        :all,
+        :order => 'sum(vote) asc',
+        :group => 'voteable_id, ' + articles_columns,
+        :limit => limit,
+        :having => ['sum(vote) < 0'],
+        :conditions => conditions,
+        :joins => 'INNER JOIN votes ON articles.id = votes.voteable_id'
+      )
+      result.paginate({:page => 1, :per_page => limit})
+  end
+
+  def self.most_liked(owner, limit = nil)
+      conditions = owner.kind_of?(Environment) ? ["votes.voteable_type = 'Article' and vote > 0"] : ["votes.voteable_type = 'Article' and vote > 0 and profile_id = ? ", owner.id]
+      result = Article.dspace.find(
+        :all,
+        :select => articles_columns,
+        :order => 'count(voteable_id) desc',
+        :group => 'voteable_id, ' + articles_columns,
+        :limit => limit,
+        :conditions => conditions,
+        :joins => 'INNER JOIN votes ON articles.id = votes.voteable_id')
+      result.paginate({:page => 1, :per_page => limit})
+  end
+
+  def self.most_disliked(owner, limit = nil)
+      conditions = owner.kind_of?(Environment) ? ["votes.voteable_type = 'Article' and vote < 0"] : ["votes.voteable_type = 'Article' and vote < 0 and profile_id = ? ", owner.id]
+      result = Article.dspace.find(
+        :all,
+        :order => 'count(voteable_id) desc',
+        :group => 'voteable_id, ' + articles_columns,
+        :limit => limit,
+        :conditions => conditions,
+        :joins => 'INNER JOIN votes ON articles.id = votes.voteable_id')
+       result.paginate({:page => 1, :per_page => limit})
+  end
+
+  def self.most_voted(owner, limit = nil)
+    conditions = owner.kind_of?(Environment) ? ["votes.voteable_type = 'Article'"] : ["votes.voteable_type = 'Article' and profile_id = ? ", owner.id]
+      result = Article.dspace.find(
+        :all,
+        :select => articles_columns,
+        :order => 'count(voteable_id) desc',
+        :group => 'voteable_id, ' + articles_columns,
+        :limit => limit,
+        :conditions => conditions,
+        :joins => 'INNER JOIN votes ON articles.id = votes.voteable_id')
+      result.paginate({:page => 1, :per_page => limit})
+  end
+end
diff --git a/plugins/dspace/public/style.css b/plugins/dspace/public/style.css
new file mode 100644
index 0000000..c7dc261
--- /dev/null
+++ b/plugins/dspace/public/style.css
@@ -0,0 +1,79 @@
+#content .dspace-plugin_dspace-block  {
+  padding: 10px 0px 10px 10px;
+  word-wrap: break-word;
+}
+
+.dspace-plugin_dspace-block ul {
+  margin: 0px;
+  padding: 0px 0px 0px 20px;
+}
+.dspace-plugin_dspace-block li {
+  margin: 0px;
+  padding: 0px;
+  list-style: none
+}
+.dspace-plugin_dspace-block a {
+  text-decoration: none;
+}
+.dspace-plugin_dspace-block .block-footer-content {
+  font-size: 10px;
+}
+.dspace-plugin_dspace-block .block-footer-content a:hover {
+  text-decoration: underline;
+}
+
+.dspace-plugin_dspace-block p {
+    text-align:center;
+}
+
+.dspace-plugin_dspace-block  p.like{
+  background-image: url('images/positive-hand.png');
+  background-repeat: no-repeat;
+  min-width: 50px;
+  text-align:center;
+}
+
+.dspace-plugin_dspace-block  p.dislike{
+  background-image: url('images/negative-hand.png');
+  background-repeat: no-repeat;
+  min-width: 50px;
+  text-align:center;
+}
+
+
+.dspace-plugin_dspace-block {
+  //overflow: hidden;
+  display: block;
+  width: 100%;
+}
+
+
+.dspace-cover img {
+  width: 100%;
+}
+
+.dspace-plugin_dspace-block span.title {
+  display: block;
+  margin: 20px 0px 0px;
+  padding: 0px 0px 0px 20px;
+}
+
+.dspace-plugin_dspace-block span.title.mread {
+
+}
+
+.dspace-plugin_dspace-block span.title.mcommented {
+
+}
+
+.dspace-plugin_dspace-block span.title.mliked {
+
+}
+
+.dspace-plugin_dspace-block span.title.mdisliked {
+
+}
+
+.dspace-plugin_dspace-block span.title.mvoted {
+
+}
diff --git a/plugins/dspace/test/test_helper.rb b/plugins/dspace/test/test_helper.rb
new file mode 100644
index 0000000..cca1fd3
--- /dev/null
+++ b/plugins/dspace/test/test_helper.rb
@@ -0,0 +1 @@
+require File.dirname(__FILE__) + '/../../../test/test_helper'
diff --git a/plugins/dspace/test/unit/article.rb b/plugins/dspace/test/unit/article.rb
new file mode 100644
index 0000000..64ecbcb
--- /dev/null
+++ b/plugins/dspace/test/unit/article.rb
@@ -0,0 +1,148 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+require 'comment_controller'
+# Re-raise errors caught by the controller.
+class CommentController; def rescue_action(e) raise e end; end
+
+class DspaceBlockTest < ActiveSupport::TestCase
+
+  include AuthenticatedTestHelper
+  fixtures :users, :environments
+
+  def setup
+    @controller = CommentController.new
+    @request    = ActionController::TestRequest.new
+    @response   = ActionController::TestResponse.new
+    @profile = create_user('testinguser').person
+    @environment = @profile.environment
+  end
+  attr_reader :profile, :environment
+
+  def enable_vote_plugin
+    enabled = false
+    environment=Environment.default
+    if Noosfero::Plugin.all.include?('VotePlugin')
+      if not environment.enabled_plugins.include?(:vote)
+        environment.enable_plugin(Vote)
+        environment.save!
+      end
+      enabled = true
+    end
+    enabled
+  end
+
+ should 'list most commented articles' do
+    Article.delete_all
+    a1 = create(TextileArticle, :name => "art 1", :profile_id => profile.id)
+    a2 = create(TextileArticle, :name => "art 2", :profile_id => profile.id)
+    a3 = create(TextileArticle, :name => "art 3", :profile_id => profile.id)
+
+    2.times { Comment.create(:title => 'test', :body => 'asdsad', :author => profile, :source => a2).save! }
+    4.times { Comment.create(:title => 'test', :body => 'asdsad', :author => profile, :source => a3).save! }
+
+    # should respect the order (more commented comes first)
+    assert_equal a3.name, profile.articles.most_commented_dspace(Environment.default, 3).first.name
+    # It is a2 instead of a1 since it does not list articles without comments
+    assert_equal a2.name, profile.articles.most_commented_dspace(Environment.default, 3).last.name
+  end
+
+
+  should 'find the most voted' do
+    if not enable_vote_plugin
+      return
+    end
+    article = fast_create(Article, {:name=>'2 votes'})
+    2.times{
+      person = fast_create(Person)
+      person.vote_for(article)
+    }
+    article = fast_create(Article, {:name=>'10 votes'})
+    10.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    article = fast_create(Article, {:name=>'5 votes'})
+    5.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    articles = Article.most_voted(Environment.default, 5)
+    assert_equal '10 votes', articles.first.name
+    assert_equal '2 votes', articles.last.name
+  end
+
+  should 'list the most postive' do
+    if not enable_vote_plugin
+      return
+    end
+    article = fast_create(Article, {:name=>'23 votes for 20 votes against'})
+    20.times{
+        person = fast_create(Person)
+        person.vote_against(article)
+    }
+    23.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    article = fast_create(Article, {:name=>'10 votes for 5 votes against'})
+    10.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    5.times{
+        person = fast_create(Person)
+        person.vote_against(article)
+    }
+    article = fast_create(Article, {:name=>'2 votes against'})
+    2.times{
+        person = fast_create(Person)
+        person.vote_against(article)
+    }
+
+    article = fast_create(Article, {:name=>'7 votes for'})
+    7.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    articles = Article.more_positive_votes(Environment.default, 5)
+    assert_equal '7 votes for', articles.first.name
+    assert_equal '23 votes for 20 votes against', articles.last.name
+  end
+
+  should 'list the most negative' do
+    if not enable_vote_plugin
+      return
+    end
+    article = fast_create(Article, {:name=>'23 votes for 29 votes against'})
+    29.times{
+        person = fast_create(Person)
+        person.vote_against(article)
+    }
+    23.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    article = fast_create(Article, {:name=>'10 votes for 15 votes against'})
+    10.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    15.times{
+        person = fast_create(Person)
+        person.vote_against(article)
+    }
+    article = fast_create(Article, {:name=>'2 votes against'})
+    2.times{
+        person = fast_create(Person)
+        person.vote_against(article)
+    }
+    article = fast_create(Article, {:name=>'7 votes for'})
+    7.times{
+        person = fast_create(Person)
+        person.vote_for(article)
+    }
+    articles = Article.more_negative_votes(Environment.default, 5)
+    assert_equal '23 votes for 29 votes against', articles.first.name
+    assert_equal '2 votes against', articles.last.name
+  end
+end
\ No newline at end of file
diff --git a/plugins/dspace/test/unit/dspace_block_test.rb b/plugins/dspace/test/unit/dspace_block_test.rb
new file mode 100644
index 0000000..24f8b49
--- /dev/null
+++ b/plugins/dspace/test/unit/dspace_block_test.rb
@@ -0,0 +1,47 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+require 'comment_controller'
+# Re-raise errors caught by the controller.
+class CommentController; def rescue_action(e) raise e end; end
+
+class DspaceBlockTest < ActiveSupport::TestCase
+
+  include AuthenticatedTestHelper
+  fixtures :users, :environments
+
+  def setup
+    @controller = CommentController.new
+    @request    = ActionController::TestRequest.new
+    @response   = ActionController::TestResponse.new
+
+    @profile = create_user('testinguser').person
+    @environment = @profile.environment
+  end
+  attr_reader :profile, :environment
+
+  should 'have a default title' do
+    dspace_block = DspacePlugin::DspaceBlock.new
+    block = Block.new
+    assert_not_equal block.default_title, dspace_block.default_title
+  end
+
+  should 'have a help tooltip' do
+    dspace_block = DspacePlugin::DspaceBlock.new
+    block = Block.new
+    assert_not_equal "", dspace_block.help
+  end
+
+  should 'describe itself' do
+    assert_not_equal Block.description, DspacePlugin::DspaceBlock.description
+  end
+
+  should 'is editable' do
+    block = DspacePlugin::DspaceBlock.new
+    assert block.editable?
+  end
+
+  should 'expire' do
+    assert_equal DspacePlugin::DspaceBlock.expire_on, {:environment=>[:article], :profile=>[:article]}
+  end
+
+end
diff --git a/plugins/dspace/test/unit/dspace_plugin_test.rb b/plugins/dspace/test/unit/dspace_plugin_test.rb
new file mode 100644
index 0000000..08087c5
--- /dev/null
+++ b/plugins/dspace/test/unit/dspace_plugin_test.rb
@@ -0,0 +1,29 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class DspacePluginTest < ActiveSupport::TestCase
+
+  def setup
+    @plugin = DspacePlugin.new
+  end
+
+  should 'be a noosfero plugin' do
+    assert_kind_of Noosfero::Plugin, @plugin
+  end
+
+  should 'have name' do
+    assert_equal 'Relevant Content Plugin', DspacePlugin.plugin_name
+  end
+
+  should 'have description' do
+    assert_equal  _("A plugin that lists the most accessed, most commented, most liked and most disliked contents."), DspacePlugin.plugin_description
+  end
+
+  should 'have stylesheet' do
+    assert @plugin.stylesheet?
+  end
+
+  should "return DspaceBlock in extra_blocks class method" do
+    assert  DspacePlugin.extra_blocks.keys.include?(DspacePlugin::DspaceBlock)
+  end
+
+end
diff --git a/plugins/dspace/views/box_organizer/dspace_plugin/_dspace_block.html.erb b/plugins/dspace/views/box_organizer/dspace_plugin/_dspace_block.html.erb
new file mode 100644
index 0000000..4322476
--- /dev/null
+++ b/plugins/dspace/views/box_organizer/dspace_plugin/_dspace_block.html.erb
@@ -0,0 +1,8 @@
+<div id='edit-dspace-block'>
+  <%= labelled_form_field _('Limit of items per category'), text_field(:block, :limit, :size => 3) %>
+  <%= labelled_check_box _('Display most accessed content'), "block[show_most_read]", 1 ,@block.show_most_read %><BR>
+  <%= labelled_check_box _('Display most commented content'), "block[show_most_commented]", 1 ,@block.show_most_commented %><BR>
+  <%= labelled_check_box _('Display most liked content'), "block[show_most_liked]", 1 ,@block.show_most_liked %><BR>
+  <%= labelled_check_box _('Display most voted content'), "block[show_most_voted]", 1 ,@block.show_most_voted %><BR>
+  <%= labelled_check_box _('Display most disliked content'), "block[show_most_disliked]", 1 , @block.show_most_disliked %><BR>
+</div>
\ No newline at end of file
--
libgit2 0.21.2