In TC (and the others i believe as well) you can just hit alt+f1 and then alt+f2 and it will jump to the next panel.
2. The word "Folder" would look nicer if it was spelled as "Directory" or at least "dir"
![Smile :)](./images/smilies/icon_e_smile.gif)
3. ACDSee has a tagging feature (which I actually use A LOT, but as a matter of fact - only when moving my photos from camera or sorting them so...).
I allows you to mark (tag) files even across directories as you browse (and have them "tagged" temporary, until you close the application) "feed them to listbox", basically having a "tagged files" location where you can see them all together (or perform any other bulk operations on them, as mass rename or an automation etc.). A killer feature.
http://files.acdsystems.com/english/sup ... photos.pdf
Now after living the snappy experience of NC, I can't go back to ACDSee even if it's just for the times I'm sorting photos, it will eat my nerves.
4. One more thing that do really miss a lot is the CTRL + RIGHT ARROW and CTRL + LEFT ARROW from TC, which makes both panels have the same location (the source panel side being left or right depending on the arrow key used)