Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
ScreenPlay - Open-source and cross-platform Wallpaper, Widgets and AppDrawer app.
Live GIF - Convert live photos to GIF
Lively Wallpaper - What is it? Lively is a Free and Open-Source Software (FOSS) for animated desktop wallpapers.
GIF Brewery by Gfycat - Create stunning GIFs from videos & screen recording for free
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.