To be clear, because of how Android Wear works, these are apps for your smartphone that have extended features for Android Wear. There are two Google apps listed, Maps and Hangouts, to go along with plenty of other options like: money management apps, Level Money and Personal Capital Finance; travel apps, American Airlines and Delta; and, news apps, The Guardian and Thomas Reuters.
But, the list also does appear to be incomplete. Evernote just announced an update to its app that brings Android Wear support, but isn't on the list. We've also seen plenty of other apps that are apparently in the works, but haven't been properly updated yet, like Gmail and Twitter.