A while ago I did a roundup of the different softwares I have been using in my HTPC. The list in that post is not complete, so I it’s time to put together a quick list of links to software alternatives when you want to build your own HTPC.
And if you are interested in HTPCs and media centers in general here is a good collection of links from eirikso.com.
ShowShifter (RIP) (Unfortunately not existing anymore)
Got All Media (Free)
My Media System (Free)
Xbox Media Center (Free)
Elisa Media Center (Free)
And over here you’ll find a list in Wikipedia comparing features of some of the packages.
Please comment if I forgot something important!