Export list of installed packages in SublimeText

You can easily get the list of installed packages by looking at Package Control's user preferences file: Preferences -> Package Settings -> Package Control -> Preferences - User and checking the installed_packages value.

Getting the URL as well is a bit more complicated, but can be done for example by executing the following in ST's Python console (View menu -> Show Console):

import os; [(os.path.dirname(file)[len('Packages/'):], sublime.decode_value(sublime.load_resource(file))['url']) for file in sublime.find_resources('package-metadata.json')]