Apps similar to My Christmas Tree include Festivitas. It's paid, but Christmas Elf is free. Other options are Rainaissance. In total there are three Desktop Customization Tools like My Christmas Tree for Mac, Windows, iPhone and iPad.
Bring holiday cheer to your Mac with festive lights illuminating your dock and menu bar. Automatically activated on launch, enjoy a customizable aesthetic to suit your preferences and add warmth to your desktop environment during the holiday season.
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Rain on your Mac. Works in full-screen, on all your monitors, and has glorious splashes. One-time purchase for up to 5 devices.
Christmas Elf will help you to fully decorate your Windows desktop for Christmas. The app offers many ways to decorate for the holidays, including lights and garlands, different types of snow, Christmas trees, festive tunes, and beautiful wallpapers.
