iStat Menus - "An advanced Mac system monitor for your menubar."
Unsplash Wallpapers for Mac (Official) - Curated, HD desktop background photos from Unsplash.
Process Explorer - The top window always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that Process Explorer is in: if it is in handle mode you'l…
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
MenuMeters for El Capitan - MenuMeters for OS X El Capitan 10.11 (and later)
Wallpaper Wizard - Wow-worthy backgrounds for Mac