Looking for a spare directory?  This ZCPR3 utility can display a 
brief disk map, showing which users have files and how many 
directory entries the files use.  Or it can display only a brief 
summary of the total number of entries used, the number of 
entries still free, and free disk space.  Version 1.4 can display 
a list of empty directories.  With Type-3 and Type-4 versions.