For historic reasons, I leave you the links to the last versions of ADT:
linux 64 bit:http://dl.google.com/android/adt/adt-bundle-linux-x86_64-20140702.ziplinux 32 bit:http://dl.google.com/android/adt/adt-bundle-linux-x86-20140702.zipMacOS X:http://dl.google.com/android/adt/adt-bundle-mac-x86_64-20140702.zipWin32:http://dl.google.com/android/adt/adt-bundle-windows-x86-20140702.zipWin64:http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20140702.zip
After that, you can update ADT plugin after 20140702 version. This answer was intended for the ones starting from zero.