[jeekl]

Try speedbar or sr-speedbar: http://www.emacswiki.org/emacs/SrSpeedbar

[lflux]

Neither those nor emacs-nav come close to working and looking the same way the file tree drawer in TextMate (or other IDEs) does. speedbar only shows directories, not files, when I navigate dirs in it.

[macmac]

You have to enable file types in the Speedbar cf. http://stackoverflow.com/questions/2220005/how-do-i-enable-S... I think you will find that the TextMate tree drawer is a toy compared to the Speedbar.

[bitcracker]

Thanks! In org-mode I can even access list nodes within the files in the SpeedBar immediately!

I agree with markokocic: Emacs is brilliant. I tested many editors but always returned to Emacs. In the beginning Emacs is a pain to learn but once you get it it's indispensable.