In Win7 I used to use Dexpot for this, and was really happy with it. But it doesn't work well in Win10, so I tried using the Virtual Desktop feature that's built into Windows now, and was disappointed to find that there's no taskbar pager included. For reference, the taskbar pager in Dexpot looks like this (found in Google Images):
... although I had configured mine to have 2 rows of 4 desktops each (i.e. a 4x2 grid).
Considering the basics of virtual desktops are already there in Win10, I'd like an app that just provides a taskbar pager that works with those.
But I'd also accept a full-blown virtual desktop app, if it works very similarly to Dexpot (and to the KDE&GNOME pager applets from Linux, which Dexpot works like).