GradientSquare
[FREE high-quality, hi-res, HD] gradient backgrounds are always such a great idea regardless of whether you need them for website, blog or offline work.
You can find a ton of free gradients here, all created with PHOXO - The Tiny, Fast, Easy To Use, Powerful, Free, Image & Photo Editor from Phoxo.com.
Go ahead dude, click on each, click one more time to zoom to 1600x900px and rightclick to save the image to your hard disk. Too boring? Well, clicking through all these might be a project in itself! So don't bother brother. Download the zip file from the top right of sqlhtm.com.
Download the complete 47 gradient [1920x1080px] zip file here.