MREDRUP  I've used this in the past and like it, but it's kind of expensive for the casual home user. I might consider it next time it's offered at a discount.  
(Version 4.3.1)

ICONZ113  This looks interesting, the main feature of this app is to be able to set an apps default save location?  
(Version 4.3.1)

MACSTERDAM  This is one of the few system add-ons I find to be indispensable. It seriously enhances all aspects of the open/save sheets, and in a such way that it feels part of the original OS.

It speeds up my workflow enormously. And in addition, the developer is always quick with updates to make sure it still works with Apple latest updates.

Well worth the money, I think.  
(Version 4.3.1)

HIPPEMAN  Well done again! I'm glad that all the bugs I found myself working with DF on SL are listed here as being fixed. Keep up the good work and thanks to the developer!  
(Version 4.3.1)

GORDON142  This app makes save dialogs 100% more useful and is an incredible time-saver. On top of that, the developer is incredibly responsive to support requests and has always been able to solve any issues I have had with the product (even to the extent of providing pre-release or custom builds).  
(Version 4.3.1)

MARUKO DRINKING TEAM  Good idea! A visual display of the path without touching any mouse (or even touching the keyboard) would be a very welcome addition.

I too install this as part of an automated setup script for any Mac (along with LaunchBar, MondoMouse, PTHPasteboard, and one of Typinator|Textpander|whatever (depending who's winning the text expansion battle at the moment)).  
(Version 4.3.1)

JO*  I couldn't live without this anymore. Among one of the first apps I install whenever I buy a new Mac besides a few other indispensables such as 1Password or KeyCue.

One thing I'm missing though is a folder hirarchy list similar to the finder below the main window (between the main window and the tag/preview pane) for a quick glance of where in my folder list I am. I know there is a drop down hirarchy list right below the filename entry field but that requires touching the mouse and I'm so much a keyboard person that I try to avoid the mouse whenever possible.

Hope the dev reads along here now and then and takes this as a feature request. Don't know if that's feasible but maybe the dev might wanna have a look into this.  
(Version 4.3)

JMTSKILLS  Default Folder X is fantastic! This program is a huge time saver. It's great to be able to quickly save files without having to drill down through folder hierarchies. The tagging system is extremely effective too. Now I can easily search files based on relevant terms which may not have been present in my documents. The developer is extremely responsive too. I e-mailed him to see if I might be able to position the app's menu bar on the left side of the screen instead of the right and in less than a week he incorporated that into a new version!

Fellow lefties (and people whose primary languages read right to left) you can now option-click on the Settings button the Default Folder X v. 4.3.1d4 preference pane and turn on the "ToolbarOnLeft" checkbox :)  
(Version 4.3)

RONL  SUPERB! Well worth the money.

I've been using DF for years and would not even want to imagine what it would be like to not have it.

Thanks!  
(Version 4.3)

KORM  This is an indispensable app.  
(Version 4.3)