Download of Wallpaperly 1.2.6 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. Wallpaperly for Mac relates to Theming Tools. This free Mac app is a product of ThinkYeah.
From the developer:
Wallpaperly is a handy wallpaper player providing hundreds of beautiful wallpapers. You can pick out your own collection from classified high-resolution wallpapers. You can change the wallpaper at the frequency you set in the app. The tool allows you to set the selected wallpapers on all the screens or desktops in use.
You may want to check out more software for Mac, such as Wallpaper Wizard: HD Wallpapers Collection, Wallble - HD Wallpapers or Live Wallpaper, which might be similar to Wallpaperly.