OpenTransport (some old apps. no longer works Quark?)
iChat - replaced by Messages
Stickies are gone from default install :-(, - replaced by Notes.app
FrontRow
iSync
Remote install
Rosseta (for old PowerPC apps)
BootCamp support only Windows 7
Windows Sharing is no longer based on Samba
Java is no longer included by default, download is here
QuickTime 7 no longer in fresh install, but you can download it.
AppleTalk
Classic