A good project tree browser for Emacs?

Question

Do you know of a good project tree browser for Emacs other than the Emacs Code Browser (ECB)? The features I value are simplicity, lightweightedness, and language agnosticism.

Answer 1

Projectile + NeoTree are my combination of choice.

Projectile just uses your version control system to track files and has an awesome jump to file in project function.

Also, check the notes for integrating the two together.

Answer 2

Speedbar?

If you just want to manage related files, perhaps you would like eproject.