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diff --git a/script/switch-theme.rb b/script/switch-theme.rb
new file mode 100755
index 000000000..47f81c7a8
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+++ b/script/switch-theme.rb
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+#!/usr/bin/env ruby
+# -*- coding: utf-8 -*-
+
+# A simple script to swap around your Alaveteli themes when you're
+# hacking on Alaveteli.  By default this assumes that you have an
+# 'alaveteli-themes' directory at the same level as your alaveteli git
+# repository, e.g.:
+#
+# alaveteli
+# ├── app
+# ├── cache
+# ...
+# └── vendor
+# alaveteli-themes/
+# ├── alavetelitheme
+# ├── asktheeu-theme
+# ├── chiediamo-theme
+# ├── ipvtheme
+# ├── queremossabertheme
+# ├── tuderechoasaber-theme
+# ├── whatdotheyknow-theme
+# └── yourrighttoknow
+#
+# However, you can override the location of your themes directory with
+# the environment variable ALAVETELI_THEMES_DIR.
+#
+# You need to have a corresponding general.yml file called, for example:
+#
+#   config/general-whatdotheyknow-theme.yml
+#   config/general-yourrighttoknow.yml
+
+require 'tempfile'
+
+theme_directory = ENV['ALAVETELI_THEMES_DIR']
+alaveteli_directory = File.expand_path(File.join(File.dirname(__FILE__),
+                                                 ".."))
+unless theme_directory
+  theme_directory = File.expand_path File.join(alaveteli_directory,
+                                               '..',
+                                               'alaveteli-themes')
+end
+
+unless File.exists? theme_directory
+  STDERR.puts "The theme directory '#{theme_directory}' didn't exist."
+  exit 1
+end
+
+# Assume that any directory directly under theme_directory is a theme:
+$available_themes = Dir.entries(theme_directory).find_all do |local_theme_name|
+  next if [".", ".."].index local_theme_name
+  next unless local_theme_name
+  full_path = File.join theme_directory, local_theme_name
+  next unless File.directory? full_path
+  next unless File.directory? File.join(full_path, '.git')
+  local_theme_name
+end
+
+if $available_themes.empty?
+  STDERR.puts "There were no theme directories found in '#{theme_directory}'"
+  exit
+end
+
+def usage_and_exit
+  STDERR.puts "Usage: #{$0} <THEME-NAME>"
+  $available_themes.sort.each do |theme_name|
+    STDERR.puts "  #{theme_name}"
+  end
+  exit 1
+end
+
+usage_and_exit unless ARGV.length == 1
+requested_theme = ARGV[0]
+usage_and_exit unless $available_themes.include? requested_theme
+
+full_theme_path = File.join theme_directory, requested_theme
+
+config_directory = File.join alaveteli_directory, 'config'
+general_filename = File.join config_directory, "general.yml"
+theme_filename = File.join config_directory, "general-#{requested_theme}.yml"
+
+if File.exists?(general_filename) && ! (File.symlink? general_filename)
+  STDERR.puts "'#{general_filename}' exists, but isn't a symlink"
+  exit 1
+end
+
+unless File.exists? theme_filename
+  STDERR.puts "'#{theme_filename}' didn't exist"
+  exit 1
+end
+
+def symlink target, link_directory, link_name
+  tmp = Tempfile.new link_name, link_directory
+  if system("ln", "-sfn", target, tmp.path)
+    full_link_name = File.join(link_directory, link_name)
+    begin
+      File.rename tmp.path, full_link_name
+    rescue Errno::EISDIR
+      STDERR.puts "Couldn't overwrite #{full_link_name} since it's a directory"
+      exit 1
+    end
+  else
+    STDERR.puts "Failed to create a symlink from #{tmp.path} to #{target}"
+    exit 1
+  end
+end
+
+symlink(File.basename(theme_filename),
+        config_directory,
+        "general.yml")
+
+symlink(File.join(full_theme_path, 'public'),
+        File.join(alaveteli_directory, 'public'),
+        'alavetelitheme')
+
+symlink(full_theme_path,
+        File.join(alaveteli_directory, 'vendor', 'plugins'),
+        requested_theme)
+
+STDERR.puts """Switched to #{requested_theme}!
+You will need to restart any development server you have running."""