The official Blender Web site, Blender.org is the place to go for nearly anything Blender related. Most obviously, this Web site is the one to visit when you want to download the latest stable version of Blender. Not only that, but you can also track new developments in the Blender Foundation and Blender Institute, including new features being coded into Blender.
Another item of interest is the official Blender User Manual online. This “live” manual is in wiki format, so it's constantly being updated as changes are made to Blender.
You can also use this site to find Blender trainers who have been certified by the Blender Foundation or go to the Gallery to sit back and enjoy some of the best artwork created by the many skilled artists in the community.