1. 2013 Navigation Upgrade remove Workplace
Move most used items toward the front of each area
Related Entities on Form
Sitemap Editor:
Manual Steps for Sitemap editing:
2011/03/22/sitemap-editing-in-crm- 2011/

2. CRM 2013 Custom Navigation Options

3. 2015 New Features. Products Multi-Entity Search SLA Enhancements
Families, Hierarchies, Properties
Multi-Entity Search
SLA Enhancements
Pause
Tablet
Multiple Dashboards
Offline Draft records
Phone
Cortona Voice Commands
Calculated Fields
Rollup Fields
PBL
Scope
Or / If-Else
Outlook Configuration
Oauth Support
Business Process Flows
Branching / If-Then-Else
Hierarchy Security Model
FLS for OOB fields