There’s new content in the following science/social sciences databases (interdisciplinary humanities as well), so you will want to run your regular searches, and new ones, through these old favorites again:
Science Direct– we now have access to almost double the amount of journals– over 2000 of ‘em!
ACM Digital Archive (that would be the Association for Computing Machinery)–we now have access to the complete digital archive, which includes proceedings from both the ACM and the IEEE.
ACS Complete package (American Chemical Society)– access to all 45 of their journals
SpringerLink–access to almost all of the ebooks and journals published by Springer, and that’s a lot! We now have a link to the SpringerLink database as a whole so you can search across all content at once.