Harold Desktop Groundskeeper
v0.6.15 · Windows 10 & 11
Harold is a cartoon groundskeeper who roams your Windows desktop, mows grass that grows across the screen, turns naturally at the edges, wipes his brow, rests and takes drink breaks. His optional password-protected Screen Guard keeps Harold and the growing grass active above the guarded desktop; press Esc when ready to reveal the password field. Configure his schedule, sizes, sound, grass behavior, startup and automatic updates from Settings.
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Because this comes from a tiny, brand-new publisher, Windows may show an “unrecognized app” warning the first time — that's a reputation flag, not a sign of anything harmful. Click More info → Run anyway. Only ever download from this site.