The best open source alternative to HyperDock is Rectangle, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to HyperDock and 12 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to HyperDock are Shiftit (Free, Open Source), altdrag (Free, Open Source), Taekwindow (Free, Open Source) and Penc (Free, Open Source).
Windawesome (pronounced - contrary to what you would expect from the way it is written - Windows-om, not Wind-awesome) is a highly customizable tiling/dynamic window manager with multi-monitor support for Windows, which works on top of explorer.exe and not as a shell replacement.
MacOS toolbar utility application that makes window management easier. Currently, application supports fullscreen, halves, and conversation to normal size. Use either keyboard shortcuts or drag&drop window to top/left/right of your screen.