Most PocketPCs come with a copy of Outlook if you don't have a copy already. And yes, newer ones still use Activesync. The idealogy behind it is a bit different then the Palm. Connecting your PDA starts the sync, and it ends when the PDA is disconnected. Thus, if I make a change on the PDA or in Outlook, they sync this data immediatly, even if my PDA has been connected for 8 hours already. Hence "Activesync".

Mac users have PocketMac that can sync to several programs, including Address Book and iCal in OS X.2.