ImageJ-1.51k plugins, URLs, LICENSE

Dear Wayne,
I would like to prepare a package of ImageJ for Gentoo Linux but It is difficult to find the source code of plugins. There used to exist http://rsb.info.nih.gov/ij/download/zips/ but there is no file for 1.50 release. Further, the listing at http://imagej.net/download/zips/ is even more outdated.

It appears I can get the plugins from http://wsr.imagej.net/distros/cross-platform/ files. Is that the right place?

I have system-wide installed jython. Can the code in the below files respect my system-wide jython installation instead of re-fetching its own copy? (sorry, I am a bit lazy now to read the relevant code to see what it is actually needed for)
plugin/frame/Editor.java
plugin/PlugInInterpreter.java
plugin/Macro_Runner.java

I think the page http://imagej.net/download.html lacks a link where to downloadable separate plugin zip files for a given imagej1 version.

Similarly, the page http://imagej.net/plugins/index.html lacks a Download section/pointer.

The page https://imagej.nih.gov/ij/source/ seems to contain a 1.51j version only and the plugins/ subdirectory seems incomplete. Or containing just core plugins?

It would be helpful if the *.zip files contained a plaintext file called LICENSE with the actual license text. Reading https://imagej.net/Licensing does not ensure me ImageJ-1.51j is actually https://choosealicense.com/licenses/bsd-2-clause/ .

Thank you for your help,
Martin

Review the listed Java files and the download, plugin index, source, and Licensing pages named in the issue. Start by comparing the available versioned plugin ZIP locations and the documented ImageJ license, then check how the three files handle Jython. Done means the package-source links, Jython requirement, and ZIP license information are clearly documented or corrected.

Written by the indexing model from the issue text.