I came across this whilst looking for PA MOD skins. One of the preview pics had this on it so I googled it. It's a small app that plays almost any music format. It can also be skinned and has loads of skins on the site. Plugins are limited, but I suspect it's fairly new. The app is freeware I believe, so should be eligible for PA.
Presently it has two versions, an installer and a portable version. The current stable version is 1.0 build 100. Though there is a beta at build 124 and the next build is the stable release build 125. I'm unsure if this includes the portable version or not.
Anyway the home page is below, check it out its a great little app -
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