A right click on an open window shows you a menu item "Always On Top" to place the window on top of others.
Pros & Cons:
If you are looking for more features for controlling windows, PowerMenu is a good choice. After installing this program, a right click on an open window will show up a menu item "Always On Top" for placing that window on top of other windows.
Other features available in the menu include setting transparency of windows to a certain percentage of your choice and minimizing windows to tray. These extra features prove handy while most other candidates do not offer.
A drawback of the program is that it does not support some skinned windows of desktop apps, neither does it work well with some modern apps including Calculator, OneNote, etc., running in Windows 10. Moreover, the tool is no longer supported by the developer.
PowerMenu was reviewed by Gizmos Freeware on based on version 1.51.