Like the "Always on Top" feature that some programs have? TurboTop lets you set any window to be "Always on Top!"Discontinued
Last version is from 2016. See release date: http://www.savardsoftware.com/turbotop/download.asp
TrayIt! - minimize to the system icon tray any program (Outlook Express, Notepad, Word, Internet Explorer, Sunbird, Thunderbird, Opera, OpenOffice etc.) and get more room in the Taskbar!Discontinued
The official website is no longer available. Last version, 126.96.36.199, released on June 2008, can be still downloaded from Softpedia.
PowerMenu is a small application that some extra menu items to the windows control menu in addition to the standard "Close", "Maximize", etc options. The extra menus are: Priority, Always On Top, Transparency and Minimize To Tray.Discontinued
The app is no longer updated, but it can be still downloaded from the official website.