iTheater
Pros:
- freeware OpenSource / GPL open for extensions
Cons:
- only Release Candidate not finished yet
MediaCentral
Pros:
- freeware supports EyeTV
- closest Userfeeling to FrontRow supports ATI Remote and Salling Clicker supports access to Bonjour shared Libraries from iTunes / iPhoto
Cons:
- UI not very maclike, not as beautiful as FrontRow
mMedia
Pros:
- freeware supports EyeTV easy skinnable supports Internet radios, tv viewing via EyeTV more features than FrontRow in general
Cons:
- haven’t tried it yet 😉
CenterStage
Pros:
- freeware OpenSource built in XCode and Obj C very extendable lot of Extensions (planned) very promising
Cons:
- not finished only a few features implemented yet
not free: FrontRow
Pros:
- preinstalled on new macs easy remote control tight integration into iLife and the OS
Cons:
- only on selected Apple hardware no extensions / limited features