I've always maintained a list of my own links to updates, but I learned of these two links today. You can find and manage updates for SharePoint and Project Server with these two links. I hope you find this useful; they both hold a coveted spot in my favorites for CUs now.
Find and manage updates for SharePoint 2013 and SharePoint 2010 in one place. Use the links on this page to get more information about updates and download the updates themselves.
SharePoint Updates: http://technet.microsoft.com/en-us/library/dn789211(v=office.14).aspx
Find and manage updates for Project Server 2013 and Project Server 2010 in one place. Use the links on this page to get more information about updates and to download the updates themselves.
Project Server Updates: http://technet.microsoft.com/en-us/library/dn789214(v=office.14).aspx
Based on the number of views this post has received, I'm curious what is driving the interest. Please post a comment and let me know.