William Kennedy, author of Go in Action, writes tutorials on Go concurrency, slices, channels, and package management.
Commenters call it invaluable for learning Go and describe Kennedy as a great teacher; his OOP mechanics post is cited.
There are some people trying to remedy this issue. While the Golang designers don't feel the need to include it in the language, others may resolve this. Id recommend reading the goals doc, as they seem to have a good starting point.
http://www.goinggo.net/2014/01/go-package-management-for-2014.html?m=1
They're all cofounders/involved in Gophercon, here are linkedin profiles:
https://www.linkedin.com/in/brianketelsen
http://www.linkedin.com/in/erikstmartin
Can't find for William Kennedy, so here's his blog: http://www.goinggo.net/
Go is an example of a classless OOP language.
Here's a good example http://www.goinggo.net/2015/03/object-oriented-programming-mechanics.html
Honorable mention of https://www.goinggo.net/
William is one of the Authors of "Go in Action" and a great teacher.
I found William Kennedy's blog to be invaluable when learning Go. He's also a top bloke.
https://www.goinggo.net