WinSplit Revolution, which lets you set locations and sizes in pixels for various window options, worked beautifully for splitting my wide monitor into thirds, but did not survive the transition to Windows 10. I can find countless window managers that let me snap to the left half or the right half, or if they're particularly fancy into quarters. But I have yet to find a tool with keyboard hotkeys that will divide the monitor space into thirds, or let me set custom locations so I can do it myself.

What am I missing?