Some of my favorite books on writing:
Thanks for the list! I’ll probably end up putting some of those in the other resources chapter.
Another good resource: developers.google.com – technical writing courses. Though the page has “courses” in the title, it links to pre-class materials for those courses (one, two) that are freely available and useful on their own.
It’s been a few years since I initially posted this. And while it’s not yet complete, it does have quite a bit more content than it did at the time. :)
The biggest recent change is that it has a new website which makes things much nicer to read online than browsing markdown files on GitHub.