Microsoft Dynamics CRM 2015 is expected to arrive before the end of the 2014 calendar year. Check the Release Preview Guide and the Get Ready for new release for information on the new features. The Help Center has lot of resources for the Customers, Developers and Administrators.

Software
Microsoft Dynamics CRM Server 2015
Microsoft Dynamics CRM Server 2015 for Microsoft Office Outlook (Outlook Client)
Microsoft Dynamics CRM 2015 Email Router
Microsoft Dynamics CRM 2015 Report Authoring Extension
Microsoft Dynamics CRM 2015 Language Packs
Microsoft Dynamics CRM 2015 List Component for SharePoint
Unified Service Desk for Dynamics CRM

Documentation

Microsoft Dynamics CRM 2015 Software Development Kit
Training and Adoption Kit for Microsoft Dynamics CRM 2015
Deployment and Administration
Administration Guide for Unified Service Desk for Dynamics CRM
Dynamics CRM Implementation Guide
Unified Service Desk Developer Guide
Operating On-Premises CRM 2015
Report writing with CRM 2015 for Online and On-Premises
Tablet Support for Microsoft Dynamics CRM 2015
Mobile Phone Support for Microsoft Dynamics CRM 2015
Upgrading Microsoft Dynamics CRM Server
Compatibility with Microsoft Dynamics CRM 2015
Microsoft Dynamics CRM 2015 Scalability and Performance Documentation

Other Resources
Videos and eBooks
YouTube
Convergence Video Library

Tools
Developer Tools
Microsoft Dynamics CRM 2015 Custom Code Validation Tool
Xrm Toolbox