Downloading E
The E sources and the erights.org website are both maintained in Subversion. If you have a subversion client, you can check out the latest E sources by doing, for example,
$ svn co svn://svn.synchrona.org/erights/e/trunk e
You can obtain the erights.org website by doing
$ svn co svn://svn.synchrona.org/erights/doc doc
With the TortoiseSVN client, you can simply click on the svn: links above to check out these source trees.
Download (a somewhat stale version of) javadoc-umentation (7MB) for E and the tamed Java libraries, or view online.
You can download the stale, broken, and non-open-source edoc sources here. Some of these files are derived from files in Sun's javadoc implementation, and so are covered by the SCSL license, which isn't open source. All those files should easily be replacable once edoc is modified to use sinjdoc rather than javadoc.
keio: Kevin Reid's draft implementation of EIO for E-on-Java.
Read Kevin's announcement and more before using. I expect the eventual official EIO implementation for E-on-Java will be based instead on Kevin's implementation of EIO for E-on-CL.
Keio depends on Java's NIO, which was introduced as of Java 1.4.
I only maintain links below for a small number of the most recent releases, and for certain important old versions so long as there's a reason why someone might want to use these. If you wish to obtain a version for which there's no link below, please let me (webmaster-at-erights.org) know