LinPHA is an easy to use, multilingual, flexible photo/image archive/album/gallery written in PHP. It uses a SQL database to store information about your pictures. It comes with a HTML based installer, so you don't need experience in setting up SQL
XULPlayer is a media player built on Mozilla XUL and MPlayer. It intends to be a flexible, user-friendly and web-enabled all-in-one media player/transcoder/manager which brings best audio/video experience on PC as well as in living room.
Music player with library for Linux (including Android) and Windows
Music player with touch optimized interface written using Qt/QML. It is especially useful for well tagged big music collection. It is easy to find and play the music you want.