diff --git a/Casks/crosspack-avr.rb b/Casks/crosspack-avr.rb
new file mode 100644
index 0000000000..eb94d6a1cf
--- /dev/null
+++ b/Casks/crosspack-avr.rb
@@ -0,0 +1,27 @@
+class CrosspackAvr < Cask
+  url 'http://www.obdev.at/downloads/crosspack/CrossPack-AVR-20131216.dmg'
+  homepage 'http://www.obdev.at/products/crosspack/'
+  version 'CrossPack-AVR 20130-12-16'
+  sha1 'd255e7822e961c002691fbb0d19a564a819c7386'
+  install 'CrossPack-AVR.pkg'
+  after_uninstall do
+  	IO.popen('yes | sudo -E /usr/local/CrossPack-AVR/uninstall && sudo pkgutil --forget at.obdev.CrossPack-AVR', 'r+') do |pipe|
+  		pipe.close_write
+  		while line = pipe.gets
+  			puts line
+  		end
+  	end
+  end
+
+  def caveats
+    <<-EOS.undent
+         CrossPack-AVR can normally install multiple versions side-by-side.
+         Therefore, running install will typically install multiple versions
+         of the tools in /usr/local/ (e.g. /usr/local/CrossPack-AVR-20131216).
+         
+         This cask will invoke the CrossPack-AVR uninstall script when it is
+         uninstalled, removing the most recent version of the tools.
+    EOS
+  end
+
+end