The multimedia player Gplayer (AppStore link) has always belonged to the “also run” category. It doesn't really have anything outstanding or unique – no wonder it hasn't become a winner in any of my full roundups (UPnP, SMB, WMV, Silverlight streaming, MKV etc.).
Nevertheless, if you do want to use it, you'll be delighted to hear it has just received iPhone 5 (iPod touch 5) screen support: