I have see that the homepage
http://www.osgi.org/Repository/BIndex
do not respond anymore

I think that the new homepage is (where all the osgi projects have
migrated):
https://github.com/osgi

probably the bindex code was now replaced by another project

I see you can download the latest .jar from here
https://osgi.org/download/bindex.jar

Ciao
Davide