Glad to help - thank you for the life-saving Framework Assistant. :)
OS X does the goofy extension-hiding that XP does by default. Going into Finder/Preferences/Advanced and turning on "show all extensions" is supposed to make them all show up, but it doesn't for me - only some show .app. But doing a Get Info shows that the ones I checked do have ".app" and doing a search for "app" shows that what seems like all apps have it. So, that's a qualified "yes, they all seem to."
OS X does the goofy extension-hiding that XP does by default. Going into Finder/Preferences/Advanced and turning on "show all extensions" is supposed to make them all show up, but it doesn't for me - only some show .app. But doing a Get Info shows that the ones I checked do have ".app" and doing a search for "app" shows that what seems like all apps have it. So, that's a qualified "yes, they all seem to."