Always-on-top is the free utility that allows any program window to stay on top of all other windows even when it does not have the focus.
TrayIt! Alternatives
TrayIt! is described as '- 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!' and is an app. There are more than 25 alternatives to TrayIt! for a variety of platforms, including Windows, Linux, PortableApps.com, File Explorer and Thunderbird apps. The best TrayIt! alternative is SmartSystemMenu, which is both free and Open Source. Other great apps like TrayIt! are RBTray, KDocker, SmartContextMenu and Actual Window Manager.
Alternatives list
9 Always on Top alternatives
FireTray is system tray extension for Linux and Windows that targets Mozilla Firefox, Thunderbird and SeaMonkey.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Windows
- Linux
- Waterfox
- Pale Moon
- Thunderbird
- SeaMonkey
- Firefox
DiscontinuedThe developer announced in December 2015 that the extension was no longer developed: https://foudil.fr/blog/209/the-web-is-not-the-platform/ The extension still works on XUL-based Firefox forks like
Waterfox and 
Pale MoonFireTray vs TrayIt! Comments
- FireTray is Free and Open Source
- FireTray is Customizable
Chameleon Window Manager will allow you to control the windows of your programs using customizable buttons added to the title bars of the windows (Always on Top, Minimize to Tray, Minimize to Caption, Specify Transparency, Position window at left/right of screen).
Cost / License
- Freemium
- Proprietary
Platforms
- Windows
- Windows Explorer
+4
Process Manager for Windows is a utility which allows you to to set process priority, minimize windows to the system tray, and more—all via taskbar window button right-click menus.
Cost / License
- Free
- Open Source
Platforms
- Windows
P
Moo0 WindowMenuPlus lets you have extra useful menus in every windows "system window menu". Its the menu that you can access through right-clicking on any windows title bar or taskbar button. This tool can add extra menus there such as "Keep on Top"...
Cost / License
- Free
- Proprietary
Platforms
- Windows
Minime is a tool that allows you to minimize applications to the system tray using a simple hotkey. What makes this tool somewhat unique is that it keeps your system tray clean by minimizing all applications into a single tray icon.
Cost / License
- Free
- Proprietary
Alerts
- Discontinued
Platforms
- Windows
Clicky Gone allows you to hide your selected windows from view, this includes the taskbar button associated with the application. This utility particularly helps with protecting your privacy by hiding things like your browser with banking details up and someone walks in on you.
Min2Tray - a utility for MS WindowsTM NT and higher to minimize and hide a window to system tray area of taskbar as icon.
Cost / License
- Free
- Open Source
Platforms
- Windows
Small little program that allows Windows 2000/XP users to make any window transparent. Right-click on any window or press the keyboard shortcuts (Control + Shift + [0-9]) to make any window transparent. Its that simple.
Cost / License
- Free
- Proprietary
Platforms
- Windows
Cost / License
- Paid
- Proprietary
Platforms
- Mac
France
EU
Russia
Firetray only deals with Mozilla applications.