No specific info about version 4.1. Please visit the main page of Webshots Wallpaper & Screensaver on Mac Informer.
Wallpaper Clocks allows you to set wallpapers that include the date and time.
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.
Ultimate Webshots Converter is a Webshots pictures converter.
Wallpaper Wednesday can change the wallpaper of your Mac using a random feed.