Define playlists for whatever fits your needs. Basic version allows one playlist, Stoppage Pro version can define any number. Stoppage Pro also automatically defines a Global playlist that will be available while playing any other playlist.
Edit Playlists, add/remove items, define order of play
In the Pro version, you can give songs a name useful to you. You can also define the start & end points for a song to create clips. Original song files are not changed.
Simple one button control to play songs. When one song is finished or is stopped, the current song is automatically advanced. A song may be selected to play it next.

In the Pro version, the Global playlist is available while playing other playlists.
Playing an item from the Global playlist interrupts the current playlist, then the playlist resumes where it left off.