Do you have NAS or FTP server with music files?
MakePlaylist app will make m3u playlist files for all your music collection.
When click "make" on a directory, the app will look for every sub directories with music files and make m3u playlist files for each folder.
m3u file name will be named after each folder name with m3u extension.
If you want to add more capabilities, please leave a comment, I will try to work on it right away as soon as possible.
*****Instruction*****
1. Make a new ftp server connection
2. Connect to a server you created
3. Navigate through the root music folder.
4. Click "Make" button to allow this app to create every possible m3u playlist files for your iTunes