Ubuntu Home Server
Recently I discovered Ubuntu Home Server Project. As project creators say:
Ubuntu Home Server (UHS) will be an edition of the Ubuntu operating system which allows users to administer their home network. With Ubuntu Home Server you will be able to store all your music, songs and pictures in one central location, to access your files over the internet and to backup all the computers in your house.
So, hopefully we’ll have a good alternative to Windows Home Server. Especially, Ubuntu has the most attractive user interface IMHO. Also, we should take into account that recently open source home automation system Plutohome was ported to Kubuntu. I can see the good tendency that two great software product for home are concentrated on the same OS.