Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
Photomosh - Turn anything into a vaporwave
Lively Wallpaper - What is it? Lively is a Free and Open-Source Software (FOSS) for animated desktop wallpapers.
MVGEN - Make your own music videos with audio, gifs, and special effects
ScreenPlay - Open-source and cross-platform Wallpaper, Widgets and AppDrawer app.
HearSeeParty - Combine Gifs with with music using tags