These resources include tons of beautiful backgrounds for PCs and ... this is definitely one of the best places to find it. Wallpaper Engine is a paid app on Steam, but it more than justifies ...

then Lively Wallpaper is your best bet. However, if you want more control and access to creations from the Steam Workshop, ...

This is probably the best ... wallpaper collections created by various publishers or users in the community. These collections can be later set as slideshows on the Desktop or Lock screen backgrounds.