Seraphim

I used to use it as well. Back in Windows 9x days I used to use GetRight. Now I use JDownloader.

You could actually set it to change skin on every song in playlist. Great feature if you were skin hoarder like me.

For anyone wanting to get a nostalgia hit: Winamp Skin Museum

Edit: Spelling

For me it’s MusicBee on desktop and Aimp on Android.