Android SDK 3.0
--Windows
http://dl.google.com/android/installer_r10-windows.exe
http://dl.google.com/android/android-sdk_r10-windows.zip
--Mac OS X(intel)
http://dl.google.com/android/android-sdk_r10-mac_x86.zip
--Linux(i386)
http://dl.google.com/android/android-sdk_r10-linux_x86.tgz
Android NDK r5b
--Windows
http://dl.google.com/android/ndk/android-ndk-r5b-windows.zip
--Mac OS X(intel)
http://dl.google.com/android/ndk/android-ndk-r5b-darwin-x86.tar.bz2
--Linux
http://dl.google.com/android/ndk/android-ndk-r5b-linux-x86.tar.bz2
Android SDK 2.3
--Windows
http://dl.google.com/android/android-sdk_r08-windows.zip
http://dl.google.com/android/installer_r08-windows.exe
--Linux (i386)
http://dl.google.com/android/android-sdk_r08-linux_86.tgz
--MAC OS X (intel)
http://dl.google.com/android/android-sdk_r08-mac_86.zip
Android NDK r5
--Windows
http://dl.google.com/android/ndk/android-ndk-r5-windows.zip
--Mac OS X (intel) r5
http://dl.google.com/android/ndk/android-ndk-r5-darwin-x86.tar.bz2
--Linux 32/64-bit (x86) r5
http://dl.google.com/android/ndk/android-ndk-r5-linux-x86.tar.bz2