Unity Technologies Provided
Unity Technologies provides some valuable learning material for you right out of the box by way of the product documentation. That documentation is installed with Unity and Unity iPhone, or it can be found online at the following URL:
Note: as of today the Unity iPhone documentation is only available by installing Unity iPhone itself.
Unity Technologies also provides some additional learning material in the Resources area of our website. These include tutorials, example projects, videos of all sorts, sample assets and more. All of that is available for free and is available at the following URL:
Unity Technologies also maintains our company blogs, and in many posts we include videos that can often include valuable material for you to consider. You can read our blogs, and find our videos at the following URLs:
Unity Videos on Vimeo
Unity Videos on YouTube
3rd Party/Community Provided
In addition to all the material above there are 3rd party companies providing learning material about Unity. In particular, Noesis Interactive is providing courseware for Unity for educators as well as dedicated developer material for both individual customers as well as corporate clients. All of it is based on their great on-demand video material:
And of course the community itself is an extremely valuable source of information. Members of the community help maintain the community wiki, others have written or are writing books and many others maintain their own tutorial sites, all are worth checking out.
The Unify Community Wiki can be found here:
Unify Community Wiki
Here are links for information about published books and magazines that focus on Unity:
Unity Game Development Essentials (book)
Unity 3D Game Development by Example Beginner's Guide (book)
Creating 3D Game Art for the iPhone with Unity (book, coming Oct. 29, 2010)
Unity Creative (magazine)
And you can find 3rd party forums, community sites, tutorials and other materials at the following URLs:
Here are some Vimeo and YouTube links for video based learning resources:
Unity Game Engine (Playlist)
We're maintaining a reddit.com page for Unity Tutorial materials and websites:
Unity Tutorials on reddit.com
If all else fails, Search!
If you go through all of the above and still aren't finding what you need, or you're just trying to find a more efficient way of searching relevant resource sites, then give Ben "RobotDuck" Pitt's custom Google search a look:
Unity Reference Search Engine
In one search it combs the Unity site, the forums, Unity Answers and a bunch of other sites (including some community sites). Very handy, very useful.
How to Contribute
If you maintain or know of any learning resources that are not listed above that you think should be included in this post then please send a private message to me (HiggyB) and let me know so I can update this post, thanks!