Not really. There are form-fillers and password managers, but that's not what I'm talking about here. Similar there are some "apps" and "widgets" available for

Not really. There are form-fillers and password managers, but that's not what I'm talking about here. Similar there are some "apps" and "widgets" available for some browsers, but its not the same thing as the apps with local storage that I'm talking about. Perhaps I'm not being able to clearly communicate my ideas...