https://developer.nvidia.com/embedded/downloads
JetPack (the Jetson SDK) is an on-demand all-in-one package that bundles developer software for the NVIDIA® Jetson platform. Use the JetPack installer to flash your Jetson Developer Kit with the latest OS image, to install developer tools for both host PC and Developer Kit, and to install the libraries and APIs, samples, and documentation needed to jumpstart your development environment.
JetPack 3.3 is packaged with newer versions of TensorRT and cuDNN from the last release.
Note that JetPack installer is available only for 64-bit Ubuntu Linux 14.04 on your host PC. For important information about this release, see the JetPack 3.3 Release Notes.
Archived versions available here.