diff --git a/Gemfile b/Gemfile
index cb78d4c3..788637eb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -69,6 +69,7 @@ gem 'terminal-table'
 gem 'validates_hostname'
 gem 'webpacker'
 gem 'yaml_db', git: 'https://0xacab.org/sutty/yaml_db.git'
+gem 'kaminari'
 
 # database
 gem 'hairtrigger'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8846d2a5..d8dd4fb4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -309,6 +309,18 @@ GEM
     jekyll-write-and-commit-changes (0.2.0)
       jekyll (~> 4)
       rugged (~> 1)
+    kaminari (1.2.1)
+      activesupport (>= 4.1.0)
+      kaminari-actionview (= 1.2.1)
+      kaminari-activerecord (= 1.2.1)
+      kaminari-core (= 1.2.1)
+    kaminari-actionview (1.2.1)
+      actionview
+      kaminari-core (= 1.2.1)
+    kaminari-activerecord (1.2.1)
+      activerecord
+      kaminari-core (= 1.2.1)
+    kaminari-core (1.2.1)
     kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -669,6 +681,7 @@ DEPENDENCIES
   jekyll-data!
   jekyll-images
   jekyll-include-cache
+  kaminari
   letter_opener
   listen (>= 3.0.5, < 3.2)
   loaf
diff --git a/Makefile b/Makefile
index 36139d7a..592592bd 100644
--- a/Makefile
+++ b/Makefile
@@ -108,7 +108,6 @@ ota-js: assets ## Actualizar Javascript en el nodo delegado
 
 ota: ## Actualizar Rails en el nodo delegado
 	umask 022; git format-patch $(commit)
-	scp ./0*.patch $(delegate):/tmp/
 	ssh $(delegate) mkdir -p /tmp/patches-$(commit)/
 	scp ./0*.patch $(delegate):/tmp/patches-$(commit)/
 	scp ./ota.sh $(delegate):/tmp/
diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index 3ef26720..dbdd4d0a 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -22,21 +22,21 @@ class PostsController < ApplicationController
 
     # XXX: Cada vez que cambiamos un Post tocamos el sitio con lo que es
     # más simple saber si hubo cambios.
-    if stale?([current_usuarie, site, filter_params])
-      # Todos los artículos de este sitio para el idioma actual
-      @posts = site.indexed_posts.where(locale: locale)
-      # De este tipo
-      @posts = @posts.where(layout: filter_params[:layout]) if filter_params[:layout]
-      # Que estén dentro de la categoría
-      @posts = @posts.in_category(filter_params[:category]) if filter_params[:category]
-      # Aplicar los parámetros de búsqueda
-      @posts = @posts.search(locale, filter_params[:q]) if filter_params[:q].present?
-      # A los que este usuarie tiene acceso
-      @posts = PostPolicy::Scope.new(current_usuarie, @posts).resolve
+    return unless stale?([current_usuarie, site, filter_params])
 
-      # Filtrar los posts que les invitades no pueden ver
-      @usuarie = site.usuarie? current_usuarie
-    end
+    # Todos los artículos de este sitio para el idioma actual
+    @posts = site.indexed_posts.where(locale: locale)
+    # De este tipo
+    @posts = @posts.where(layout: filter_params[:layout]) if filter_params[:layout]
+    # Que estén dentro de la categoría
+    @posts = @posts.in_category(filter_params[:category]) if filter_params[:category]
+    # Aplicar los parámetros de búsqueda
+    @posts = @posts.search(locale, filter_params[:q]) if filter_params[:q].present?
+    # A los que este usuarie tiene acceso
+    @posts = PostPolicy::Scope.new(current_usuarie, @posts).resolve
+
+    # Filtrar los posts que les invitades no pueden ver
+    @usuarie = site.usuarie? current_usuarie
   end
 
   def show
@@ -54,7 +54,7 @@ class PostsController < ApplicationController
 
   def new
     authorize Post
-    @post = site.posts.build(lang: locale, layout: params[:layout])
+    @post = site.posts(lang: locale).build(layout: params[:layout])
 
     breadcrumb I18n.t('loaf.breadcrumbs.posts.new', layout: @post.layout.humanized_name.downcase), ''
   end
@@ -154,7 +154,9 @@ class PostsController < ApplicationController
   #
   # @return [Hash]
   def filter_params
-    @filter_params ||= params.permit(:q, :category, :layout).to_h.select { |_, v| v.present? }
+    @filter_params ||= params.permit(:q, :category, :layout).to_hash.select do |_, v|
+      v.present?
+    end.transform_keys(&:to_sym)
   end
 
   def site
diff --git a/app/models/metadata_boolean.rb b/app/models/metadata_boolean.rb
index 5e4b456f..90c002a7 100644
--- a/app/models/metadata_boolean.rb
+++ b/app/models/metadata_boolean.rb
@@ -25,10 +25,19 @@ class MetadataBoolean < MetadataTemplate
   # * false
   # * true
   def value
-    return document.data.fetch(name.to_s, default_value) if self[:value].nil?
-    return self[:value] unless self[:value].is_a? String
+    case self[:value]
+    when NilClass
+      document.data.fetch(name.to_s, default_value)
+    when String
+      true_values.include? self[:value]
+    else
+      self[:value]
+    end
+  end
 
-    self[:value] = true_values.include? self[:value]
+  # Siempre guardar el valor de este campo a menos que sea nulo
+  def empty?
+    value.nil?
   end
 
   private
diff --git a/app/models/metadata_content.rb b/app/models/metadata_content.rb
index 437a0dd9..9d3a1040 100644
--- a/app/models/metadata_content.rb
+++ b/app/models/metadata_content.rb
@@ -56,7 +56,7 @@ class MetadataContent < MetadataTemplate
         uri = URI element['src']
 
         # No permitimos recursos externos
-        element.remove unless uri.hostname.end_with? Site.domain
+        element.remove unless uri.scheme == 'https' && uri.hostname.end_with?(Site.domain)
       rescue URI::Error
         element.remove
       end
diff --git a/app/models/metadata_float.rb b/app/models/metadata_float.rb
new file mode 100644
index 00000000..b4288a3b
--- /dev/null
+++ b/app/models/metadata_float.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+# Un campo numérico de punto flotante
+class MetadataFloat < MetadataTemplate
+  # Nada
+  def default_value
+    super || nil
+  end
+
+  def save
+    return true unless changed?
+
+    self[:value] = value.to_f
+    self[:value] = encrypt(value) if private?
+
+    true
+  end
+
+  # Indicarle al navegador que acepte números decimales
+  #
+  # @return [Float]
+  def step
+    0.05
+  end
+
+  private
+
+  def decrypt(value)
+    super(value).to_f
+  end
+end
diff --git a/app/models/metadata_predefined_value.rb b/app/models/metadata_predefined_value.rb
new file mode 100644
index 00000000..9cf36382
--- /dev/null
+++ b/app/models/metadata_predefined_value.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# Un campo de texto seleccionado de una lista de valores posibles
+class MetadataPredefinedValue < MetadataString
+  # Obtiene todos los valores desde el layout, en un formato compatible
+  # con options_for_select.
+  #
+  # @return [Hash]
+  def values
+    @values ||= layout.dig(:metadata, name, 'values', I18n.locale.to_s)&.invert || {}
+  end
+
+  private
+
+  # Solo permite almacenar los valores predefinidos.
+  #
+  # @return [String]
+  def sanitize(string)
+    v = super string
+    return '' unless values.values.include? v
+
+    v
+  end
+end
diff --git a/app/models/site.rb b/app/models/site.rb
index 58f20745..ddfe2bc9 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -65,9 +65,6 @@ class Site < ApplicationRecord
 
   accepts_nested_attributes_for :deploys, allow_destroy: true
 
-  # El sitio en Jekyll
-  attr_reader :jekyll
-
   # XXX: Es importante incluir luego de los callbacks de :load_jekyll
   include Site::Index
 
@@ -180,29 +177,28 @@ class Site < ApplicationRecord
 
   # Trae los datos del directorio _data dentro del sitio
   def data
-    unless @jekyll.data.present?
-      @jekyll.reader.read_data
-
-      # Define los valores por defecto según la llave buscada
-      @jekyll.data.default_proc = proc do |data, key|
-        data[key] = case key
-                    when 'layout' then {}
-                    end
+    unless jekyll.data.present?
+      run_in_path do
+        jekyll.reader.read_data
+        jekyll.data['layouts'] ||= {}
       end
     end
 
-    @jekyll.data
+    jekyll.data
   end
 
   # Traer las colecciones.  Todos los artículos van a estar dentro de
   # colecciones.
   def collections
     unless @read
-      @jekyll.reader.read_collections
+      run_in_path do
+        jekyll.reader.read_collections
+      end
+
       @read = true
     end
 
-    @jekyll.collections
+    jekyll.collections
   end
 
   # Traer la configuración de forma modificable
@@ -290,7 +286,9 @@ class Site < ApplicationRecord
   #
   # @return [Hash]
   def theme_layouts
-    @jekyll.reader.read_layouts
+    run_in_path do
+      jekyll.reader.read_layouts
+    end
   end
 
   # Trae todos los valores disponibles para un campo
@@ -332,6 +330,12 @@ class Site < ApplicationRecord
     status == 'building'
   end
 
+  def jekyll
+    run_in_path do
+      @jekyll ||= Jekyll::Site.new(configuration)
+    end
+  end
+
   # Cargar el sitio Jekyll
   #
   # TODO: En lugar de leer todo junto de una vez, extraer la carga de
@@ -345,10 +349,7 @@ class Site < ApplicationRecord
 
   def reload_jekyll!
     reset
-
-    Dir.chdir(path) do
-      @jekyll = Jekyll::Site.new(configuration)
-    end
+    jekyll
   end
 
   def reload
@@ -526,4 +527,8 @@ class Site < ApplicationRecord
     errors.add(:design_id,
                I18n.t('activerecord.errors.models.site.attributes.design_id.layout_incompatible.error'))
   end
+
+  def run_in_path(&block)
+    Dir.chdir path, &block
+  end
 end
diff --git a/app/views/posts/attribute_ro/_float.haml b/app/views/posts/attribute_ro/_float.haml
new file mode 100644
index 00000000..67642e2c
--- /dev/null
+++ b/app/views/posts/attribute_ro/_float.haml
@@ -0,0 +1,3 @@
+%tr{ id: attribute }
+  %th= post_label_t(attribute, post: post)
+  %td{ dir: dir, lang: locale }= metadata.value
diff --git a/app/views/posts/attribute_ro/_predefined_value.haml b/app/views/posts/attribute_ro/_predefined_value.haml
new file mode 100644
index 00000000..67642e2c
--- /dev/null
+++ b/app/views/posts/attribute_ro/_predefined_value.haml
@@ -0,0 +1,3 @@
+%tr{ id: attribute }
+  %th= post_label_t(attribute, post: post)
+  %td{ dir: dir, lang: locale }= metadata.value
diff --git a/app/views/posts/attributes/_float.haml b/app/views/posts/attributes/_float.haml
new file mode 100644
index 00000000..6239c613
--- /dev/null
+++ b/app/views/posts/attributes/_float.haml
@@ -0,0 +1,6 @@
+.form-group
+  = label_tag "#{base}_#{attribute}", post_label_t(attribute, post: post)
+  = number_field base, attribute, value: metadata.value, step: metadata.step,
+    **field_options(attribute, metadata)
+  = render 'posts/attribute_feedback',
+    post: post, attribute: attribute, metadata: metadata
diff --git a/app/views/posts/attributes/_predefined_value.haml b/app/views/posts/attributes/_predefined_value.haml
new file mode 100644
index 00000000..b0d21f35
--- /dev/null
+++ b/app/views/posts/attributes/_predefined_value.haml
@@ -0,0 +1,7 @@
+.form-group
+  = label_tag "#{base}_#{attribute}", post_label_t(attribute, post: post)
+  = select_tag(plain_field_name_for(base, attribute),
+    options_for_select(metadata.values, metadata.value),
+    **field_options(attribute, metadata), include_blank: t('.empty'))
+  = render 'posts/attribute_feedback',
+    post: post, attribute: attribute, metadata: metadata
diff --git a/app/views/posts/index.haml b/app/views/posts/index.haml
index 8b776590..ad07b9dc 100644
--- a/app/views/posts/index.haml
+++ b/app/views/posts/index.haml
@@ -40,7 +40,7 @@
   %section.col
     = render 'layouts/flash'
     .d-flex.justify-content-between.align-items-center.pl-2-plus.pr-2-plus.mb-2
-      %form
+      %form{ action: site_posts_path }
         - @filter_params.each do |param, value|
           - next if param == 'q'
           %input{ type: 'hidden', name: param, value: value }
@@ -51,7 +51,7 @@
       - if @site.locales.size > 1
         %nav#locales
           - @site.locales.each do |locale|
-            = link_to t("locales.#{locale}.name"), site_posts_path(@site, **@filter_params.merge(locale: locale)),
+            = link_to @site.data.dig(locale.to_s, 'locale') || locale, site_posts_path(@site, **@filter_params.merge(locale: locale)),
               class: "mr-2 mt-2 mb-2 #{locale == @locale ? 'active font-weight-bold' : ''}"
     .pl-2-plus
       - @filter_params.each do |param, value|
@@ -72,14 +72,18 @@
           %thead
             %tr
               %th.border-0.background-white.position-sticky{ style: 'top: 0; z-index: 2', colspan: '4' }
-                = submit_tag t('posts.reorder.submit'), class: 'btn'
-                %button.btn{ data: { action: 'reorder#unselect' } }
-                  = t('posts.reorder.unselect')
-                  %span.badge{ data: { target: 'reorder.counter' } } 0
-                %button.btn{ data: { action: 'reorder#up' } }= t('posts.reorder.up')
-                %button.btn{ data: { action: 'reorder#down' } }= t('posts.reorder.down')
-                %button.btn{ data: { action: 'reorder#top' } }= t('posts.reorder.top')
-                %button.btn{ data: { action: 'reorder#bottom' } }= t('posts.reorder.bottom')
+                .d-flex.flex-row.justify-content-between
+                  %div
+                    = submit_tag t('posts.reorder.submit'), class: 'btn'
+                    %button.btn{ data: { action: 'reorder#unselect' } }
+                      = t('posts.reorder.unselect')
+                      %span.badge{ data: { target: 'reorder.counter' } } 0
+                    %button.btn{ data: { action: 'reorder#up' } }= t('posts.reorder.up')
+                    %button.btn{ data: { action: 'reorder#down' } }= t('posts.reorder.down')
+                    %button.btn{ data: { action: 'reorder#top' } }= t('posts.reorder.top')
+                    %button.btn{ data: { action: 'reorder#bottom' } }= t('posts.reorder.bottom')
+
+                  %div
           %tbody
             - dir = t("locales.#{@locale}.dir")
             - size = @posts.size
@@ -104,19 +108,19 @@
                       %span{ lang: post.locale, dir: dir }= post.title
                     - if post.front_matter['draft'].present?
                       %span.badge.badge-primary= I18n.t('posts.attributes.draft.label')
-                    - if post.front_matter['categories'].present?
-                      %br
-                      %small
-                        - post.front_matter['categories'].each do |category|
-                          = link_to site_posts_path(@site, **@filter_params.merge(category: category)) do
-                            %span{ lang: post.locale, dir: dir }= category
-                          = '/' unless post.front_matter['categories'].last == category
+                    %br
+                    %small
+                      = link_to @site.layouts[post.layout].humanized_name, site_posts_path(@site, **@filter_params.merge(layout: post.layout))
+                      - post.front_matter['categories']&.each do |category|
+                        = link_to site_posts_path(@site, **@filter_params.merge(category: category)) do
+                          %span{ lang: post.locale, dir: dir }= category
+                        = '/' unless post.front_matter['categories'].last == category
 
-                  %td
+                  %td.text-nowrap
                     = post.created_at.strftime('%F')
                     %br/
                     = post.order
-                  %td
+                  %td.text-nowrap
                     - if @usuarie || policy(post).edit?
                       = link_to t('posts.edit'), edit_site_post_path(@site, post.path), class: 'btn btn-block'
                     - if @usuarie || policy(post).destroy?
diff --git a/config/locales/en.yml b/config/locales/en.yml
index fc194eab..43ab0d0a 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -19,8 +19,8 @@ en:
     remember_me: 'Keeps session open for %{remember_for}'
   actions:
     sr-help: "After this form you'll find links to recover your account and other actions."
-  _true: Yes
-  _false: No
+  _true: 'Yes'
+  _false: 'No'
   svg:
     sutty:
       title: Sutty
@@ -163,7 +163,7 @@ en:
       signature: 'With love, Sutty'
     breadcrumb:
       title: 'Your location in Sutty'
-      logout: Exit
+      logout: Log out 
       mutual_aid: Mutual aid
   collaborations:
     collaborate:
@@ -376,6 +376,8 @@ en:
     en: 'English'
     ar: 'Arabic'
   posts:
+    prev: Previous page
+    next: Next page
     empty: "There are no results for those search parameters."
     caption: Post list
     attribute_ro:
@@ -413,6 +415,8 @@ en:
         destroy: Remove image
       belongs_to:
         empty: "(Empty)"
+      predefined_value:
+        empty: "(Empty)"
       draft:
         label: Draft
     reorder:
diff --git a/config/locales/es.yml b/config/locales/es.yml
index e8185391..880b9e7c 100644
--- a/config/locales/es.yml
+++ b/config/locales/es.yml
@@ -19,8 +19,8 @@ es:
     remember_me: 'Mantiene la sesión abierta por %{remember_for}'
   actions:
     sr-help: 'Después del formulario encontrarás vínculos para recuperar tu cuenta, entre otras acciones.'
-  _true: Sí
-  _false: No
+  _true: 'Sí'
+  _false: 'No'
   svg:
     sutty:
       title: Sutty
@@ -163,7 +163,7 @@ es:
       signature: 'Con cariño, Sutty'
     breadcrumb:
       title: 'Tu ubicación en Sutty'
-      logout: Salir
+      logout: Cerrar sesión 
       mutual_aid: Ayuda mutua
   collaborations:
     collaborate:
@@ -384,6 +384,8 @@ es:
     en: 'inglés'
     ar: 'árabe'
   posts:
+    prev: Página anterior
+    next: Página siguiente
     empty: No hay artículos con estos parámetros de búsqueda.
     caption: Lista de artículos
     attribute_ro:
@@ -421,6 +423,8 @@ es:
         destroy: 'Eliminar imagen'
       belongs_to:
         empty: "(Vacío)"
+      predefined_value:
+        empty: "(Vacío)"
       draft:
         label: Borrador
     reorder:
diff --git a/config/routes.rb b/config/routes.rb
index 2c5f1c60..5e172cda 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -57,9 +57,10 @@ Rails.application.routes.draw do
 
     # Gestionar artículos según idioma
     nested do
-      scope '(:locale)' do
+      scope '/(:locale)', constraint: /[a-z]{2}/ do
         post :'posts/reorder', to: 'posts#reorder'
         resources :posts do
+          get 'p/:page', action: :index, on: :collection
           get :preview, to: 'posts#preview'
         end
       end
diff --git a/db/migrate/20210926205448_add_uniqueness.rb b/db/migrate/20210926205448_add_uniqueness.rb
new file mode 100644
index 00000000..7399ba4c
--- /dev/null
+++ b/db/migrate/20210926205448_add_uniqueness.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+# Agrega índices únicos que pensábamos que ya existían.
+class AddUniqueness < ActiveRecord::Migration[6.1]
+  def change
+    add_index :designs, :name, unique: true
+    add_index :designs, :gem, unique: true
+    add_index :licencias, :name, unique: true
+  end
+end