You can now experience Dynamics CRM 2015 online and on-premise. Specially some enhancements have been added to the new features launched with CRM 2013 and great new features have been introduced with the latest version.
You can find more downloads related to CRM 2015 from here http://www.microsoft.com/en-ca/search/Results.aspx?q=dynamics%20crm%202015&form=DLC
C R M F o r t r e s s | Indika's Dynamics 365 CE Blog 