Playlist Creator is the classical one-trick pony: Creates playlists - no more, no less. Originally developed by oddgravity, now released to the general public.
Be aware that the codebase is rather old and uses C++ with MFC (Microsoft Foundation Classes). As for the IDE Visual Studio 2008 was used.
So if somebody wants to pick up development I would recommend to do a rewrite in a modern language. My choice would have been C# with WPF but I never found the spare time to do this.
Cheers Michael
The following build environment was installed on a Windows 7 machine:
C:\Program Files\Microsoft SDKs\Windows\v7.1\Include
C:\Program Files\Microsoft SDKs\Windows\v7.1\Lib
Playlist Creator is MIT-licensed.