Homebrew-Cask extends Homebrew and allows you to install large binary files via a command-line tool. Examples of these files is Google Chrome, Dropbox, VLC and Spectacle.
As of December 2015, Cask comes installed with Homebrew, if you have not installed Homebrew see the Homebrew section.
To see if an app is available on Cask you can search on the official Cask website. You can also search using the following command:
$ brew cask search <package>
Quick Look plugins
These plugins adds support for the corresponding file type to Mac Quick Look (In Finder, mark a file and press Space to start Quick Look). The plugins includes features like syntax highlighting, markdown rendering, preview of JSON, patch files, csv, zip files and more.
$ brew cask install \ qlcolorcode \ qlstephen \ qlmarkdown \ quicklook-json \ qlprettypatch \ quicklook-csv \ betterzipql \ webpquicklook \ suspicious-package
Here are some useful apps that are available on Cask.
$ brew cask install \ alfred \ android-file-transfer \ asepsis \ appcleaner \ caffeine \ cheatsheet \ docker \ doubletwist \ dropbox \ google-chrome \ google-drive \ google-hangouts \ flux \ latexian \ 1password \ pdftk \ spectacle \ sublime-text \ superduper \ totalfinder \ transmission \ valentina-studio \ vlc