Use GNU find to show only the leaf directories

You can use -links if your filesystem is POSIX compliant (i.e. a directory has a link for each subdirectory in it, a link from its parent and a link to itself, thus a count of 2 links if it has no subdirectories).

The following command should do what you want:

find dir -type d -links 2

However, it does not seems to work on Mac OS X (as @Piotr mentioned). Here is another version that is slower, but does work on Mac OS X. It is based on his version, with a correction to handle whitespace in directory names:

find . -type d -exec sh -c '(ls -p "{}"|grep />/dev/null)||echo "{}"' \;

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