Elliot Hughes, A google Engineer posted on his G+ page an announcement that Google is now hosting the Android Platform tools as separate binaries for download. Previous to this you would have to download the full android developer tools which can be very large.
Until this announcement other alternatives would be to get these tools from other sources on the internet that are less reputable and open yourself up to malware. As a recent victim of identity theft myself this is always something I keep in mind when downloading applications.
As a non-developer these tools are essential for flashing new roms, side loading applications or even updating/restoring your devices with factory images provided by google and other manufacturers.
You can download the binaries for your platform of choice using the links below.