Recently, I came across the site "Tech Presentations" when researching specific presentations. So far, I take "Tech" in this context to mean mostly related to the Internet.
From the about page of the associated blog:
Authors of this blog are digging up technical presentations from different conferences and events.
Quite often such presentations share information that can’t be found in books or articles and can give you insights at technology advances, company culture and even people personalities.
One nice thing the site provides is different views of the collected presentations, including by:
Perhaps other folks will find this to be of some use at some point