Force.com helps you develop new applications and integrations
to help your organization or for resale to other organizations.
Use improved Developer Console features to more easily manage code in your organization.
Develop apps that combine Visualforce and maps, including Salesforce1 and other mobile apps.
Apex Code Apex enhancements enable you to rely on the debug log's order of precedence, and use location and distance bind variables. Also, enhancements include code coverage changes and new classes and methods.
Lightning Components The Lightning Component framework powers Salesforce1. Use the framework to build mobile apps and pages faster than ever.
Access more metadata types and data objects in API version 34.0.
ISVforce Summer ’15 includes packaging enhancements.