No specific info about version 1.3. Please visit the main page of Wallcat on Mac Informer.
Wallpaper Clocks allows you to set wallpapers that include the date and time.
Sets famous works of art as wallpapers for your desktop.
Unsplash Wallpaper is a pack with wallpapers for Mac.
Utility that finds great photos from National Geographic website and allows you to use them as your desktop Wallpaper.
Wallpaper Wednesday can change the wallpaper of your Mac using a random feed.