The JD-800 Patch Organizer created by Laurent Lecatelier-Dudec (France), was released as freeware in 24/04/1999 (date in original author´s site) and is no more available from the programmer´s site.
In more recent years, Gwydion Elderwin (Australia) created a JD-800 Randon Bank Creator and a Jd-800 to JD-990 Bank Converter.
About the patch banks here.
The first I found many years ago, was compiled by Stephen Drake, the guy who kept most of JD material available for years. This site is proud to pay him our tribute. Thanks Stephen!
The first internet banks are so-so grouped, thus makes some sense.
Gwydion also have done a strong work removing duplicates from hundreds of patches, adding lots more and creating a library for each synth. Still is missing time to classify all that stuff into categories.
Missing all you my friends, I know business and daily life take time, but I would be happy to receive some news.
The bank files are in .rar format. You need Winrar or compatible to extract it.
Christian Morency released a Beta version of a VST Patch Editor for the Roland JD-800 and JD-990.
See the following post with some info, links and video tutorials:
JD-800 JD-990 VST Patch Editor VST for CTRLR
A new post is add with a user creation for the Logic Studio platform on Mac:
JD800 Patch Organizer 230 Kb
JD800 pach banks organized by Gwydion Elderwin 499 Kb
JD800 Path banks internet colletion 407 Kb
JD800 randon bank creator 512 Kb
JD800 to JD990 Bank Converter 177 Kb
JD990 Patch Organizer 230 Kb
JD990 Pach banks organized by Gwydion Elderwin 544 Kb