diff --git a/assets/javascripts/templates/pages/about_tmpl.coffee b/assets/javascripts/templates/pages/about_tmpl.coffee
index 1698eec2..fc256fd9 100644
--- a/assets/javascripts/templates/pages/about_tmpl.coffee
+++ b/assets/javascripts/templates/pages/about_tmpl.coffee
@@ -686,6 +686,11 @@ credits = [
     '2012-2018 The Qt Company Ltd',
     'GFDL',
     'https://doc.qt.io/qt-5/licensing.html'
+  ], [
+    'R',
+    '1999–2012 R Foundation for Statistical Computing',
+    'GPL',
+    'https://svn.r-project.org/R/trunk/COPYING'
   ], [
     'Ramda',
     '2013-2020 Scott Sauyet and Michael Hurley',
diff --git a/lib/docs/filters/r/clean_html.rb b/lib/docs/filters/r/clean_html.rb
new file mode 100644
index 00000000..62f9d140
--- /dev/null
+++ b/lib/docs/filters/r/clean_html.rb
@@ -0,0 +1,61 @@
+module Docs
+  class R
+    class CleanHtmlFilter < Filter
+      def call
+        slug_parts = slug.split('/')
+
+        if root_page?
+          css('a[href$="/00index"]').each do |pkg|
+            pkg['href'] = "/r-#{pkg['href'].split('/')[1]}/"
+          end
+
+        elsif slug_parts[0] == 'library'
+          title = at_css('h2')
+          title.inner_html = "<code>#{slug_parts[3]}</code> #{title.content}"
+
+          summary = at_css('table[summary]')
+          summary.remove if summary
+
+          css('hr ~ *, hr').remove
+
+        elsif slug_parts[-2] == 'manual'
+          css('table.menu, div.header, hr, h2.contents-heading, div.contents, table.index-cp, table.index-vr, table[summary]').remove
+
+          css('h2').each do |node|
+            node.remove if node.content.end_with? ' index'
+          end
+
+          css('span[id] + h1, span[id] + h2, span[id] + h3, span[id] + h4, span[id] + h5, span[id] + h6').each do |node|
+            # We need the first of the series of span with ids
+            span = node.previous_element
+            while span.previous
+              prev = span.previous_element
+              break unless prev.name == 'span' and prev['id']
+              span.remove
+              span = prev
+            end
+
+            node['id'] = span['id']
+            span.remove
+
+            css('div.example').each do |node|
+              node.replace(node.children)
+            end
+          end
+
+          css('h1 + h1').remove
+
+          css('.footnote h5').each do |node|
+            anchor = node.at_css('a[id]')
+            footnote = node.next_sibling
+            footnote.inner_html = "<strong>#{anchor.text}</strong>&nbsp;#{footnote.inner_html}"
+            footnote['id'] = anchor['id']
+            node.remove
+          end
+        end
+
+        doc
+      end
+    end
+  end
+end
diff --git a/lib/docs/filters/r/entries.rb b/lib/docs/filters/r/entries.rb
new file mode 100644
index 00000000..ed09345d
--- /dev/null
+++ b/lib/docs/filters/r/entries.rb
@@ -0,0 +1,84 @@
+module Docs
+  class R
+    class EntriesFilter < Docs::EntriesFilter
+
+      PKG_INDEX_ENTRIES = Hash.new []
+
+      def call
+        if slug_parts[-1] == '00Index'
+          dir = File.dirname(result[:subpath])
+          css('tr a').each do |link|
+            PKG_INDEX_ENTRIES[link['href']] += [link.text]
+            next if link['href'] == link.text
+            context[:replace_paths][File.join(dir, "#{link.text}.html")] = File.join(dir, "#{link['href']}.html")
+          end
+        end
+
+        super
+      end
+
+      def slug_parts
+        slug.split('/')
+      end
+
+      def is_package?
+        slug_parts[0] == 'library'
+      end
+
+      def is_manual?
+        slug_parts[1] == 'manual'
+      end
+
+      def get_name
+        return at_css('h2').content if is_package?
+        title = at_css('h1.settitle')
+        title ? title.content : at_css('h1, h2').content
+      end
+
+      def get_type
+        return slug_parts[1] if is_package?
+        return at_css('h1.settitle').content if is_manual?
+      end
+
+      def include_default_entry?
+        is_package? and not slug_parts[-1] == '00Index'
+      end
+
+      def manual_section(node)
+        title = node.content.sub /^((Appendix )?[A-Z]|[0-9]+)(\.[0-9]+)* /, ''
+        title unless ['References', 'Preface', 'Acknowledgements'].include?(title) or title.end_with?(' index')
+      end
+
+      def additional_entries
+        if is_package? and slug_parts[-1] != '00Index'
+          page = slug_parts[-1]
+          return [page] + PKG_INDEX_ENTRIES.fetch(page, [])
+        end
+
+        return [] unless is_manual?
+
+        entries = []
+        unless slug_parts[-1].downcase == 'r-intro'
+          # Single top-level category
+          css('div.contents > ul a').each do |link|
+            link_name = manual_section(link)
+            entries << [link_name, link['href'].split('#')[1], name] unless link_name.nil?
+          end
+        else
+          # Split 1st level of manual into different categories
+          css('div.contents > ul > li').each do |node|
+            type = manual_section(node.at_css('a'))
+            next if type.nil?
+            node.css('> ul a').each do |link|
+              link_name = link.content.sub /^[0-9A-Z]+(\.[0-9]+)* /, ''
+              entries << [link_name, link['href'].split('#')[1], type]
+            end
+          end
+        end
+        return entries
+      end
+
+      private
+    end
+  end
+end
diff --git a/lib/docs/scrapers/r.rb b/lib/docs/scrapers/r.rb
new file mode 100644
index 00000000..308d1a6b
--- /dev/null
+++ b/lib/docs/scrapers/r.rb
@@ -0,0 +1,53 @@
+module Docs
+  class R < FileScraper
+    self.name = 'R'
+    self.slug = 'r'
+    self.type = 'simple'
+    self.release = '4.1.0'
+    self.links = {
+      home: 'https://www.r-project.org/',
+      code: 'https://svn.r-project.org/R/'
+    }
+
+    self.root_path = 'doc/html/packages.html'
+
+    html_filters.push 'r/entries', 'r/clean_html'
+
+    options[:skip_links] = false
+
+    options[:attribution] = <<-HTML
+      Copyright (&copy;) 1999–2012 R Foundation for Statistical Computing.<br>
+      Licensed under the <a href="https://www.gnu.org/copyleft/gpl.html">GNU General Public License</a>.
+    HTML
+
+    # Never want those
+    options[:skip_patterns] = [
+      /\/DESCRIPTION$/,
+      /\/NEWS(\.[^\/]*)?$/,
+      /\/doc\/index\.html$/,
+      /\/demo$/,
+      /\.pdf$/
+    ]
+
+    options[:replace_paths] = {
+    ## We want to fix links like so − but only if the targets don’t exist:
+    #  'library/MASS/html/cov.mve.html' => 'library/MASS/html/cov.rob.html'
+    ## Paths for target packages or keywords that do not have their own file
+    ## are generated in the entries filter from 00Index.html files
+    }
+
+    options[:skip] = %w(
+      doc/html/packages-head-utf8.html
+      doc/html/SearchOn.html
+      doc/html/Search.html
+      doc/html/UserManuals.html
+      doc/html/faq.html
+      doc/manual/R-FAQ.html
+      doc/manual/R-admin.html
+      doc/manual/R-exts.html
+      doc/manual/R-ints.html
+      doc/manual/R-lang.html
+    )
+
+  end
+end
diff --git a/public/icons/docs/r/16.png b/public/icons/docs/r/16.png
new file mode 100644
index 00000000..2b0c75da
Binary files /dev/null and b/public/icons/docs/r/16.png differ
diff --git a/public/icons/docs/r/16@2x.png b/public/icons/docs/r/16@2x.png
new file mode 100644
index 00000000..51854fc2
Binary files /dev/null and b/public/icons/docs/r/16@2x.png differ
diff --git a/public/icons/docs/r/SOURCE b/public/icons/docs/r/SOURCE
new file mode 100644
index 00000000..c02c1e37
--- /dev/null
+++ b/public/icons/docs/r/SOURCE
@@ -0,0 +1 @@
+https://svn.r-project.org/R/trunk/doc/html/Rlogo.svg