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.zipAfter that, you can update ADT plugin after 20140702 version. This answer was intended for the ones starting from zero.