ADT Bundle
Android Developer Tools (ADT) is a plugin for Eclipse that provides a suite of tools that are integrated with the Eclipse IDE. Support for the Android Developer Tools (ADT) in Eclipse is ended.

Android Studio
Android Studio is used at this time instead of ADT
  • 20140702
  1. linux 64 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86_64-20140702.zip
  2. linux 32 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86-20140702.zip
  3. MacOS X: http://dl.google.com/android/adt/adt-bundle-mac-x86_64-20140702.zip
  4. Win32: http://dl.google.com/android/adt/adt-bundle-windows-x86-20140702.zip
  5. Win64: http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20140702.zip
  • 20131030
  1. linux 64 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86_64-20131030.zip
  2. linux 32 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86-20131030.zip
  3. MacOS X: http://dl.google.com/android/adt/adt-bundle-mac-x86_64-20131030.zip  
  4. Win32: http://dl.google.com/android/adt/adt-bundle-windows-x86-20131030.zip
  5. Win64: http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20131030.zip
  • 20130729
  1. linux 64 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86_64-20130729.zip
  2. linux 32 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86-20130729.zip
  3. MacOS X: http://dl.google.com/android/adt/adt-bundle-mac-x86_64-20130729.zip
  4. Win32: http://dl.google.com/android/adt/adt-bundle-windows-x86-20130729.zip
  5. Win64: http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20130729.zip
  • 20130717
  1. linux 64 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86_64-20130717.zip
  2. linux 32 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86-20130717.zip
  3. MacOS X: http://dl.google.com/android/adt/adt-bundle-mac-x86_64-20130717.zip
  4. Win32: http://dl.google.com/android/adt/adt-bundle-windows-x86-20130717.zip
  5. Win64: http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20130717.zip  
  • 20130522
  1. linux 64 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86_64-20130522.zip
  2. linux 32 bit: http://dl.google.com/android/adt/adt-bundle-linux-x86-20130522.zip
  3. MacOS X: http://dl.google.com/android/adt/adt-bundle-mac-x86_64-20130522.zip
  4. Win32: http://dl.google.com/android/adt/adt-bundle-windows-x86-20130522.zip
  5. Win64: http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20130522.zip  
  • Others on linux/ubuntu
  1. http://let-us-android.blogspot.com/2012/11/Eclair.html#.Vss5VnV948o
  2. http://developer.android.com/sdk/older_releases.html
  3. http://soft-directories.blogspot.com/2013/06/android-sdk.html
  4. http://download.kiwix.org/dev/
  5. http://let-us-android.blogspot.in/2012/11/android-sdk-offline-intstaller-tools.html#.Vss6DnV948o