BetterTouchTool, Windy, Spectacle, Rectangle, AquaSnap, BetterSnapTool, Divvy, SizeUp, HyperDock, Zones for Mac, Cinch, WinSplit Revolution, WindowGrid, KDE Mover-Sizer, altdrag, Mosaic Window Manager, VEEER, Light Pillar Mosaic, SMBAct, Tuck, Optimal Layout, Deskovery, WindowTidy, Flexiglass, WindowSpace, Preme for Windows, yabai, Easy Move+Resize, Snap Assist, GridMove, MultiDock, Windownaut, AeroSnap, Zooom/2, MaxSnap, chunkwm, window-shuffler, Gridy, iSnap, WinNumpad Position, QuickTile, Moves for macOS, Cisdem WindowManager, TileWindows, Keypad Layout, DoublePane are some alternatives to Shiftit.