KYkyrra·Oct 10, 2019
It's a slide tool written by the Go team, mainly used by them to present at conferences. You'll also notice they've stopped using it as much recently. There was no talks in 2018, and only 1 in 2019. Previous years had many more.
List of old talks: https://talks.golang.org/
You can actually explore the entire source for the site here: https://github.com/golang/talks
The specific talk linked on this post is here: https://github.com/golang/talks/blob/master/content/2012/10t...
The tool to generate the HTML based on the linked .slide: https://godoc.org/golang.org/x/tools/cmd/present
In Things you probably don't know about Go (2012) [slides]