If they are standard and public and they work, sure. If they're not public and not standard (like MacRuby) then probably not.
I think the GP post was simply referring to the fact that a vast majority of software is 'installed' on the mac. Just drag it to the application folder. And drag it to the trash to uninstall. This almost certainly means you have a bunch of duplicated library files on your computer, but also means each app doesn't have any external dependencies.
I think the GP post was simply referring to the fact that a vast majority of software is 'installed' on the mac. Just drag it to the application folder. And drag it to the trash to uninstall. This almost certainly means you have a bunch of duplicated library files on your computer, but also means each app doesn't have any external dependencies.