ExplorerXP (freeware)
If you've become accustomed to tabbed browser windows in Opera, Firefox, or Internet Explorer 7, you probably wonder why Microsoft didn't provide tabbed windows for Windows Explorer from day 1. Fortunately for us, someone with some programming chops thought so too and took care of the issue by creating...
It is freeware for non-commercial use and provides a number of features missing from Windows Explorer in a small 410KB installation package.



Tried that one, and it is
Tried that one, and it is quite sattisfactory. The main problem is since it uses the Explorer interface still, it tends to get unstable as the original Explorer does. In fact, when it crashes it makes the system quite unstable as well...
For that reason I am currently using the A43. It has the slight advantage, that as most of the code is completely independent from Explorer, if it stops responding, you just need to kill it and the system continues to work nicely.
Maybe somebody feels like giving it a try.