Not exactly bnd / bndtools related, but useful in this context.
Use case
Recently I needed an overview about all package names we have in our workspace, to do some cleanup and check if package names conform to naming conventions etc.
So I wanted a sorted list where I can scroll through to get a quick overview.
cd myworkspace
find . -type f -name '*.java' -exec grep -h '^package ' {} + | sed 's/^package //' | sort -u > allpackages.txt
The output is written to a file allpackages.txt. Duplicate lines are removed too.