This is a quick one, in order to help you with MS CRM 2015 related downloads, so need not to go at different places/websites; all you want is here:
MS CRM 2015 Server:
MS CRM 2015 Report Authoring Extension with support for SQL server data tools:
MS CRM 2015 Outlook Client
MS CRM 2015 Language Packs:
MS CRM 2015 Email Router:
Check the compatibility of MS CRM 2015 here:
MS CRM 2015 SDK (both online & on-premise):
MS CRM 2015 Implementation Guide :
MS CRM 2015 Custom Code Validation Tool:
MS CRM 2015 List Component for MS SharePoint Server 2010 and MS SharePoint Server 2013 (for multiple browsers)
if in case, I have missed out on any downloads, please comment and i will revert back with the URL.
Thanks for reading !
Happy CRMing !