One can install Redberry automatically without downloading its binaries by following the instructions on the Installation page (and we really recommend it). Likely you will prefer to follow the instructions from Installation page and need no to download Redberry .jars.
Goto Installing and running Redberry page.
Binary jar distribution of the latest stable Redberry release for manual downloading:
The source code (packed in .jar) of the latest stable Redberry release:
Earlier versions of Redberry are available in Maven Central Repository and Redberry Bitbucket page.
Browse Redberry source code at Bitbucket: