NCurses Disk Usage
Ncdu is a disk usage analyzer with an ncurses interface. It is designed to find space hogs on a remote server where you don’t have an entire graphical setup available, but it is a useful tool even on regular desktop systems. Ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed
Source: NCurses Disk Usage
On Ubuntu, it can be installed using APT
sudo apt-get install ncdu
On OS X, it can be installed using Homebrew:
brew install ncdu