I <i>believe</i> the app is standalone but could be/have a web interface, too.<p>It aggregates popular library/language/framework API documentation on the left side, of which you can install or disable ... libraries like Lodash, Moment, Node, Express, Mocha, etc. IIRC, even JavaScript.<p>The app would install the documentation and you could omni-search, say, 'sort,' and the main right-side pane would collect the results.<p>The last I used it, years ago, it also auto-updated the documentation of each library/framework with every new library/framework release.<p>My web searches are in vain. Please help.