Adxstudio Portals
Adxstudio solution has been one of the best portal solutions on the market for a long time. Before the release of Microsoft Dynamics CRM 2016, Microsoft acquired the Adxstudio solution. This is a much anticipated feature, but at the time of writing, an updated version built under the Microsoft umbrella is not yet available.
Adxstudio provides an advanced portal platform and Application Lifecycle Management (ALM) solution built entirely on Microsoft Dynamics CRM. As such, it makes total sense to see this solution coming in the near future.
For features and details, see the documentation provided for the current version: