Here are the direct links -----
Download Android SDK Platform-tools Revision 10 (Required and recommended)
Download Android SDK Platform-tools Revision 9 (outdated)
Download Android SDK Platforms
- Android SDK Platform 4.0 (eed Nto download these two components for writing apps for Ice Cream Sandwich OS)
- Android SDK Platform 3.0, revision 2
- Android SDK Platform 2.3.3._r2
- Android SDK Platform 2.3.1_r2
- Android SDK Platform 2.2_r3
- Android SDK Platform 2.1_r3
- Android SDK Platform 2.0.1_r1