An evaluation copy of the IPP library can be downloaded by visiting the Intel Software Evaluation page. Registered owners of the product, with an up-to-date license, can download the latest edition of the library from the Intel Registration Center. Go here for help on questions regarding downloads, registration, and licensing.
IPP code samples can be downloaded by clicking the "Free Code Samples" link on the Intel IPP product page.
See this knowledge base article for a list of bug fixes, known issues, and limitations.
The Intel IPP library is also included as part of the Intel Parallel Composer and Intel Compiler Professional Edition products. Please see http://software.intel.com/en-us/articles/which-version-of-ipp--mkl--tbb-is-installed-with-intel-comp... for more information about which library component version (Intel IPP, Intel MKL and Intel TBB) is included in each Compiler Pro product release.