There is an impressive range of excellent freeware Windows enhancements  and tweaks. This posting will present forty three excellent additions to  Windows that you will like.
 1- Fences: do you ever wish that there was some way to organize your icons into general, clearly-labeled areas on your desktop  that you could move or organize without needing to deal with each icon  individually? If so, you’re in luck, as this is exactly what Fences  does. You can create floating areas on your desktop, label them, and  move icons of any type into them; you can then re-arrange these by  moving entire units around, etc. Fences will do two more things for you  (1) it will preserve/save icon locations on your screen, and (2) it will  allow you to double click an empty area on the desktop to hide all  icons.
1- Fences: do you ever wish that there was some way to organize your icons into general, clearly-labeled areas on your desktop  that you could move or organize without needing to deal with each icon  individually? If so, you’re in luck, as this is exactly what Fences  does. You can create floating areas on your desktop, label them, and  move icons of any type into them; you can then re-arrange these by  moving entire units around, etc. Fences will do two more things for you  (1) it will preserve/save icon locations on your screen, and (2) it will  allow you to double click an empty area on the desktop to hide all  icons.
 Note that Fences is still in beta and seems to exhibit some bugs on  some machines. It works fine on my XP (with XP’s Dr. Watson debugger  disabled).
  2- QTTabbar: ever imagined using explorer windows in a Firefox style tabbed interface?  This is essentially what this (terrific) freeware does, but it also  manages to deliver a range of nice functions, including the ability to  browse contents of folders without clicking into them (see screenshot),  the option to bookmark groups of open tabs, a searchbox for filtering  files, image previews on mouse-hover, as well as a slew of others.
2- QTTabbar: ever imagined using explorer windows in a Firefox style tabbed interface?  This is essentially what this (terrific) freeware does, but it also  manages to deliver a range of nice functions, including the ability to  browse contents of folders without clicking into them (see screenshot),  the option to bookmark groups of open tabs, a searchbox for filtering  files, image previews on mouse-hover, as well as a slew of others.
 QTTabbar is extendible through a handful of plugins that provide  extra functionality, including a “folder memo” plugin to add notes to  folders.
 
  3- Filebox Extender:  this one adds new buttons on the title bar next to the minimize,  maximize, and close buttons that provide favorite folders and recent  folders access anywhere (including file open/save dialogs). Other  functions: a “stay on top” pushpin button, and a window roll-up button  that hides all but the title bar of a window.
3- Filebox Extender:  this one adds new buttons on the title bar next to the minimize,  maximize, and close buttons that provide favorite folders and recent  folders access anywhere (including file open/save dialogs). Other  functions: a “stay on top” pushpin button, and a window roll-up button  that hides all but the title bar of a window.
 There are many apps that are designed to access favorite folders and  files, but this one is one of the most original and innovative.
  4- Desktop Media:  this may be familiar to you if you’ve worked with Liunx. Desktop Media  is a free program that creates automatic shortcuts on the desktop  whenever you plug in a USB drive, CD, or other media. The shortcuts will  automatically disappear when the media is ejected.
4- Desktop Media:  this may be familiar to you if you’ve worked with Liunx. Desktop Media  is a free program that creates automatic shortcuts on the desktop  whenever you plug in a USB drive, CD, or other media. The shortcuts will  automatically disappear when the media is ejected.
 This program also provides an interesting option whereby hardlink  rather than shortcuts can be (optionally) created on NTFS drives (see  “Link Shell Extension” below for more on hardlinks).
 
  5- Sizer:  allows you to you right click on the “maximize”button on the title bar  in order to quickly change the size and/or placement of the active  Window using a selection of pre-set profiles. You can add your own  user-defined sizes and placements.
5- Sizer:  allows you to you right click on the “maximize”button on the title bar  in order to quickly change the size and/or placement of the active  Window using a selection of pre-set profiles. You can add your own  user-defined sizes and placements.
 While this function hardly sounds revolutionary, I will tell you that  once you start using this one you will wonder how you managed without  it. Sizer will prove to be very useful and is in fact one of my first  installs on a new machine.
  6- Folder Menu:  this is a terrific little free app that displays favorite folders  anywhere on Middle mouse click or using a hotkey. It can even invoke  favorite folders in Windows and MS Office open/save dialogs.
6- Folder Menu:  this is a terrific little free app that displays favorite folders  anywhere on Middle mouse click or using a hotkey. It can even invoke  favorite folders in Windows and MS Office open/save dialogs.
 This is a new Autohotkey-based program that deserves to be more well  known; since installing it it’s become one of my favorites, and I am  betting that you will like it as well.
 
  7- Folder Size:  ever noticed that Windows’ detail folder view does not display sizes  for folders? Well guess what, this free Windows extension adds a column  to Windows’ “detailed” view that displays folder sizes. Check out my  review for how to get this set up.
 The latest information as I write this is that a new version 2.5 is about to be released, so watch out for that.
  8- WinSplit Revolution: a freeware program that brings instant, versatile docking and resizing of windows to the sides of the and/or corners of t
8- WinSplit Revolution: a freeware program that brings instant, versatile docking and resizing of windows to the sides of the and/or corners of t
he screen. But what is really nice is that the program allows you to  control the placement of your windows by using hotkeys, by using a  “virtual numpad” control that is prompted by clicking on the app’s icon  in the system tray, or by so-called “drag’n go”, which involves moving  your window around the screen while pressing Ctrl+Alt (whereupon it will  display visual previews of the resize area as you move your window  around – see screenshot).
 For another interesting program that offers a similar function check out PowerResizer, which is also excellent.
 
 
  9- Q-Dir:  is a free dual-pane file manager that is simply terrific. It offers a  slew of nice functions, including bookmarking favorite folders, a search  box for filtering files and folders, the ability to save configurations  of open panes and folders, and a whole host of other nifty options.  What is quite innovative about Q-Dir are the nifty buttons on the  toolbar that let the user access multiple configurations of file panes,  quickly and easily.
9- Q-Dir:  is a free dual-pane file manager that is simply terrific. It offers a  slew of nice functions, including bookmarking favorite folders, a search  box for filtering files and folders, the ability to save configurations  of open panes and folders, and a whole host of other nifty options.  What is quite innovative about Q-Dir are the nifty buttons on the  toolbar that let the user access multiple configurations of file panes,  quickly and easily.
 I personally use Q-Dir as a replacement for Windows explorer, such  that clicking on a folder in Windows will open it using Q-Dir; In that  sense it is the ultimate Windows enhancement. (See my original review of the program for instructions on how to do this, find favorite feature #6).
  10- Taskbar shuffle:  this freeware Windows extension gives you the ability to reorder the  tabs in your taskbar (on the bottom of your desktop) by dragging them at  will. Very cool!
10- Taskbar shuffle:  this freeware Windows extension gives you the ability to reorder the  tabs in your taskbar (on the bottom of your desktop) by dragging them at  will. Very cool!
  11- Standalone Stack:  this freeware allows you to create folder shortcuts that, when clicked,  open up as Mac-style hovering icon stacks. It supports two styles of  icons “grid” and “fan”. The screenshot here depicts a grid-style such  shortcut that I strategically placed in the “Quick Launch” area.
11- Standalone Stack:  this freeware allows you to create folder shortcuts that, when clicked,  open up as Mac-style hovering icon stacks. It supports two styles of  icons “grid” and “fan”. The screenshot here depicts a grid-style such  shortcut that I strategically placed in the “Quick Launch” area.
  12- TaskSwitchXP:  this is a freeware Alt+Tab replacement. It’s my favorite because it is  straightforward and simply scrolls across the different open apps and  windows while (reliably) displaying a screenshot of the selected app. It  strength is function rather than form, and I like the fact that it  bucks the 3D vista-style and the Mac Expose trends (but if you must have  these, check out WinFlip, Shock Aero, and DExpose2).
12- TaskSwitchXP:  this is a freeware Alt+Tab replacement. It’s my favorite because it is  straightforward and simply scrolls across the different open apps and  windows while (reliably) displaying a screenshot of the selected app. It  strength is function rather than form, and I like the fact that it  bucks the 3D vista-style and the Mac Expose trends (but if you must have  these, check out WinFlip, Shock Aero, and DExpose2).
  13- Link Shell Extension:  is a freeware app that allows you to right click on files and folders  and create instant (and effortless) hardlinked clones, with the single  stipulation that your hard drive should be NTFS formatted.
13- Link Shell Extension:  is a freeware app that allows you to right click on files and folders  and create instant (and effortless) hardlinked clones, with the single  stipulation that your hard drive should be NTFS formatted.
 A clone is NOT a copy. A little known piece of information is that a  file in Windows XP and Vista can be in two places at once (as long as  the hard drive is NTFS formatted and not FAT). Suppose that you keep  videos of “The Sopranos” in their “Sopranos” folder, but that you had  set up a “Favorite TV shows” folder where you wanted to keep a list of  some of the TV-show episodes you like the most. If your hard drive is  NTFS formatted, you can keep a clone of that video in that folder that  does not occupy extra space on your hard drive (rather than create a  duplicate copy.
  14- Launchy:  this is a freeware launcher for apps and files where, instead of  clicking on shortcuts or icons of the programs or files you want to  open, you type in the name of the program you are seeking in a search  box and select it from a list of results (the program will refine the  list of selections as-you-type, which is a very nice effect).
14- Launchy:  this is a freeware launcher for apps and files where, instead of  clicking on shortcuts or icons of the programs or files you want to  open, you type in the name of the program you are seeking in a search  box and select it from a list of results (the program will refine the  list of selections as-you-type, which is a very nice effect).
 By default this program will monitor (index) the execs and shortcuts  in your start menu but can be configured to look anywhere for any file  type you want. Lastly I will say that once you start using this I  guarantee you will not want to use your computer without it. Some good  Launchy alternatives (also free): Find and Run Robot, Key Launch and Keybreeze.
  15- Freesnap:  ever wanted to snap just one or two edges of your window that you’re  working with right to the side of the screen? Freesnap is a freeware  that lets you do just that (see screenshot). It will also let you use  hotkeys to quickly send your window to any of the 4 corners of the  screen (or the center), and perform a number of window-resizing  operations.
15- Freesnap:  ever wanted to snap just one or two edges of your window that you’re  working with right to the side of the screen? Freesnap is a freeware  that lets you do just that (see screenshot). It will also let you use  hotkeys to quickly send your window to any of the 4 corners of the  screen (or the center), and perform a number of window-resizing  operations.
  16- Everything:  this one is a free desktop file search program that works ONLY on NTFS  formatted drives. The reason: it relies on the Master File Table of the  NTFS volume to build its index of files, rather than constantly scanning  and
16- Everything:  this one is a free desktop file search program that works ONLY on NTFS  formatted drives. The reason: it relies on the Master File Table of the  NTFS volume to build its index of files, rather than constantly scanning  and
 scouring the hard drive. What this means is that Everything will always  be up to date with all file changes that occur on your hard drive.
 The reason this one is included in this post is that more than any  other program it has changed the way I work with Windows (with the  possible exception of Launchy, above). I now find myself constantly  right-clicking “Search Everything” on folders in order to locate the  files that I am working with. Being able to right click on my computer  in order to find a file or files anywhere on my drives is an extremely  powerful thing to be able to do.
  17- 3RVX:  this freeware allows you to control your system’s volume (up/down/mute)  through hotkeys. Its not the most feature-packed utility of its kind (Volumouse  might have that distinction), but it just may be the most pleasant to  use, looks really pretty (emulates the MacOSX volume bezel, but is  skinnable and comes with many other cool skins).
17- 3RVX:  this freeware allows you to control your system’s volume (up/down/mute)  through hotkeys. Its not the most feature-packed utility of its kind (Volumouse  might have that distinction), but it just may be the most pleasant to  use, looks really pretty (emulates the MacOSX volume bezel, but is  skinnable and comes with many other cool skins).
 This is another one of those apps I have to have installed on my machine.
  18- OSD Mute:  a very simple free app that does a very simple thing: displays a “Mute  On” message on your desktop near the system tray when the system volume  is muted. While this is not quite revolutionary, it is so useful that I  install it on all my machine, and is really an option that should have  come built into Windows.
18- OSD Mute:  a very simple free app that does a very simple thing: displays a “Mute  On” message on your desktop near the system tray when the system volume  is muted. While this is not quite revolutionary, it is so useful that I  install it on all my machine, and is really an option that should have  come built into Windows.
  19- Dexpot:  this is without a doubt the best, most feature rich and advanced  freeware virtual desktop program for Windows. It doesn’t offer some of  the eye candy that you might find in some others (animated 3D cube  transitions between desktops, for example), but what it lacks in style  in makes up for in substance (e.g. rules, hotkeys, icon placements on  different desktops). If you are unfamiliar with virtual desktops imagine  being able to work on, say, your Office applications in one desktop,  then flipping to another that has your browser/webmail, and then  flipping to a third that displays, say, your media player.
19- Dexpot:  this is without a doubt the best, most feature rich and advanced  freeware virtual desktop program for Windows. It doesn’t offer some of  the eye candy that you might find in some others (animated 3D cube  transitions between desktops, for example), but what it lacks in style  in makes up for in substance (e.g. rules, hotkeys, icon placements on  different desktops). If you are unfamiliar with virtual desktops imagine  being able to work on, say, your Office applications in one desktop,  then flipping to another that has your browser/webmail, and then  flipping to a third that displays, say, your media player.
 One thing you can do with Dexpot that I have not found anywhere else  is to actually designate different icons to different desktops. This  alone makes it the undisputed number one virtual desktop app as far as I  am concerned.
  20- Infotag Magic:  a freeware shell extension that tweaks Windows to display informational  tooltips when hovering over a range of filetypes, including audio  files, text files, shortcuts, and executables (see screenshot).
20- Infotag Magic:  a freeware shell extension that tweaks Windows to display informational  tooltips when hovering over a range of filetypes, including audio  files, text files, shortcuts, and executables (see screenshot).
 File extension types supported: wp3, wma, ape, and Ogg Vorbis (for  audio), txt, ini, log, bat, diz, bak, and que files (for text files),  exe, dll, ocx and lnk (for executables/shortcuts). I would have liked to  have tooltips support for video files; if that’s something you want it  is provided in the latest beta of MediaInfo.
Full list here: Forty-Three of The Best Free Windows Enhancements | bigBrains.com