Some of the most interesting new modules I saw posted to drupal.org in September:
Views Advanced Routing
(for Drupal 8) Allows you to specify the routing configuration YAML for a Views page. Meaning, you can use custom access control callbacks, default parameters, etc. Sweet!
Commerce Responsive UI
Provides replacement interfaces for the parts of Drupal Commerce that are table dependent and non-mobile responsive by default. These include Responsive Cart, Responsive Checkout, and Responsive User Facing Orders.
Drupal 8 Contrib Porting Tracker
Not a module, but a centralized place for tracking the Drupal 8 porting status of contributed projects (modules, themes, distributions). The best place to find out that the Bad Judgement module is ready for D8!
Advanced Image Crop
This image field cropper lets the user do a different crop in each of the image styles configured by the admin. You better have some saavy users to comprehend this, but if you do, it looks awesome.
Webform Replay [sandbox]
Extends the Webform module by adding an option to “replay” selected webform values in situations where multiple webform submissions per user are allowed, and some of that information is likely to be repeated on each submission. By enabling webform replay for these fields, the user only needs to complete them for the initial webform submission, and on subsequent entries these fields will be pre-populated with the values from the previous submission.
Forbidden File Format
Flips the file field extension checking around so that you can allow all types of files except the extensions specified. So you could deny .js, .exe, .bat, and .com, but allow other types.
Tableau WDC [sandbox]
Tableau 9.1 includes a new Web Data Connector feature, which lets you build connections to data accessible over HTTP with JSON data and REST APIs. This module attempts to bridge the gap between Drupal and Tableau by adding a new views plugin (tableau_wdc) which renders content as a JSON with some extra meta information needed by Tableau. Once you have created your endpoints, you can add the tableau-wdc block to any page and it will automatically render a button for each data source together with all the necessary scripts to parse and prepare the data for import.
Nuke Drupal Frontend
Allows you to completely disable frontend HTML access to a Drupal site, for when you’re building a headless site, and you’re not using the Drupal-provided frontend.
Doubtfire [sandbox]
An alternative to the Masquerade module, with some useful UI additions.
Gmail Connector [sandbox]
Lets users view their Gmail inbox and messages in Drupal using the Gmail RESTful API.