With some great contributions from Greg Zaal, Mathieu Auvray, and our own dr. Sybren, we have created a collection of high resolution spherical images that will help you to bring lighting and reflections to the next level in your renders.
Blender Cloud Add-on
You can browse the library directly within Blender with the Blender Cloud add-on.
HDRIs are notoriously large files, so we made sure that when you select one, you download a low-res preview first, and then you can easily change the resolution from the Image Editor or the Node Editor.
Get the latest version of the add-on and enjoy the library!