Windows: Pulse is a free program that downloads and cycles through wallpapers based on any keyword you give it.
We’ve featured a few ways to mass download wallpapers before, but if you have more specific tastes, Pulse will sit in your system tray and automatically cycle through wallpapers by keyword, like “cosmos” or “landscape.”
Right now, it’s in beta, and only uses one site—rewalls.com—as its source, but eventually it’ll support more wallpaper sites. It works better for certain search terms than others (for example, “space” returns a strange mishmash of results, while “cosmos” returns a very specific set of wallpapers), so keep trying if you aren’t getting the results you want. It’s also worth mentioning that rewalls.com is a Russian site, so there may be some loss in translation. A good way to start searching is to translate rewalls.com into English and look at the tags on the right hand side of the page—those should return some good results.
Pulse is a free download for Windows only.
Pulse <- Click here for Download