Custom Metadata Types
http://resources.docs.salesforce.com/198/0/en-us/sfdc/pdf/custom_metadata_types_impl_guide.pdf
https://developer.salesforce.com/blogs/engineering/2015/04/custom-metadata-types-ga.html
CRUD for External Objects
Salesforce now supports CRUD permission for External Objects records.
Lightning Experience
Sales Wave Analytics App
Omni-Channel
http://releasenotes.docs.salesforce.com/en-us/summer15/release-notes/rn_omnichannel_announcement.htm
Lightning Experience for Custom Objects
Next Generation Journey Builder
Next Generation Community Builder
Picklist Replace
https://help.salesforce.com/apex/HTViewHelpDoc?id=customize_replace.htm&language=en
Roll up Summary Field
Now we can create 25 roll up summary fields per object. Previously it was 10.
To check: Click on Accounts–>Click on limits
Cheers!!!