For the past year I've been referencing a community-authored blog that posts current build number references for common Microsoft applications and provides a download link to each cumulative update or service pack.
The list of applications that are referenced include System Center and SQL (definitely one you'll use a lot here). It's regularly updated (the new 2016 Tech Preview releases are all there) and goes back quite a few versions - MOM 2000 is even listed!
There's a handy navigation ribbon to choose your application or if you like, just use the tags.
Here's the blog URL: