Tablacus Explorer is a file manager with what initially sounds like an impressive feature list. It has a tabbed feature list, completely customisable menus and interface, supports mouse gestures, can be extended with addons, is portable and extremely small (1.13MB), yet still manages to squeeze in both 32 and 64-bit editions.
Some of these options work reasonably well. You can create a new tab with a keypress (Ctrl+T) or mouse click, for instance; files can be dragged and dropped from one tab to another; and once you've spotted the tiny icons in the top-right corner, you'll also be able to switch between a 1, 2 or 4-pane interface, each of which can have as many tabs as you need.
We soon ran into problems, though. The left pane of the default window wasn't wide enough to display our folder names, for instance, but you can't resize it with the mouse. It might be possible to fix this via the Options dialog, but this is so packed with unexplained options that we soon gave up looking. (Would you know what checking the "ROOTHASEXPANDO" or "NOIDENTCHECKS" might do to the tree, for instance?)
The same lack of documentation left us wondering what mouse gestures might be supported. The addon descriptions are similarly unclear. And the Options dialog interface didn't help - we were constantly left confused.
If you only want a portable tabbed file manager then maybe none of this will matter too much. All you have to do is choose your preferred pane layout and you can simply ignore everything else.
If you're actually hoping to use the more advanced features, though, be prepared to spend quite some time figuring out how they work, because the program is far from straightforward.