Nail it! Alternatives
DeskPins can be used to make any application topmost, that is, to keep it above all other windows. Just grab a pin from the DeskPins icon in the system notification area (a.k.a. taskbar tray) and click on any window.
- - DeskPins is the most popular Windows alternative to Nail it!.
- - DeskPins is the most popular Open Source & free alternative to Nail it!.
The program seems to be no longer updated. Last version, 1.32, released in February 2015, can be still downloaded from the official website.
WindowTop is a one-of-a-kind window manager tool that offers various sets of features, each of which can help to improve your daily multi-tasking work. It is extremely helpful when working with a lot of windows at the same time.
"Window On Top" is a small gadget made by Compzets.com which keeps any specific window on top of other windows. It does not have any user-interface (UI), it just sits on your tray bar and works with only a single keyboard shortcut.