Conky, BgInfo, 8GadgetPack, gDesklets, macOS Dashboard, Cysboard, Screenlets, XWidget, Eww, Samurize, Microsoft Gadgets, KDE Plasma Workspaces, BGINFO4X, Nerdtool, AlomWare 64, myBoard, Yahoo Widget, Open Sidebar, Amnesty Generator are some alternatives to AveDesk.