Until March 15, 2012, customers could download it from EDeN (Endeca Developer Network) . Since Oracle acquired Endeca in December 2011, the download page now reads:
"As of March 15, 2012, access to Endeca Technical Support Notes and previous product releases are no longer available through EDeN. The Endeca technical support note has been transferred to My Oracle Support and should be accessed."
I would not recommend using the RAD toolkit if you intend to implement any website! I rated it, and I did not find a way to build a website with a fully customized HTML layout. Use the regular presentation API, not the API that comes with the RAD toolkit, and create your own wrapper around it.
However, for an internal web application, the RAD controls may be fine ...
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