I have been tinkering with a simple playlist editor as a way of learning C++, Qt and Linux development. Right now it can create, delete and edit m3u files. Mp3s are browsable via their ID3 metadata.

https://garage.maemo.org/projects/qplaylist/

Ultimately I would like it to be able to edit MAFW playlists too.

I will try and release to extras-devel ASAP.

Here are some screenshots: