Microsoft Project Professional 2013, and SharePoint 2013 are available for download on MSDN

Following the RTM announcement: The New Microsoft Project reaches RTM! the on-premise products are becoming available in different distribution channels starting with MSDN and TechNet subscribes as show below (and yes Project Server 2013 will also be available very soon…). Please check the Office RTM post for overall timeline for other channels: Office Reaches RTM!
As a reminder there are plenty of Project 2013 resources available today:

• Product http://www.microsoft.com/project/en-us/preview/project-resources.aspx
• TechNet http://technet.microsoft.com/en-us/projectserver/fp123546
• MSDN http://msdn.microsoft.com/en-us/office/aa905469
• Blog http://blogs.office.com/b/project/
• Forums http://social.technet.microsoft.com/Forums/en-US/category/project