How do I find a list of Homebrew's installable packages?

brew help will show you the list of commands that are available.

brew list will show you the list of installed packages. You can also append formulae, for example brew list postgres will tell you of files installed by postgres (providing it is indeed installed).

brew search <search term> will list the possible packages that you can install. brew search post will return multiple packages that are available to install that have post in their name.

brew info <package name> will display some basic information about the package in question.

From the man page:

search, -S text|/text/
Perform a substring search of formula names for text. If text is surrounded with slashes,
then it is interpreted as a regular expression. If no search term is given,
all available formula are displayed.

For your purposes, brew search will suffice.

Please use Homebrew Formulae page to see the list of installable packages. https://formulae.brew.sh/formula/

To install any package => command to use is :

brew install node

Since Homebrew 2.6.0 released in 2020.12.01, brew list behaves a little differently. This is one of the reason I post the following answer.

Installed Packages

Homebrew describes packages as formulae. There's another kind of package know as cask, which is used for GUI apps installed by brew install --cask.

Formerly, brew list will only list installed formulae. After 2.6.0, brew list will list both of packages and casks. You may wanna check them separately

• brew list --formula
• brew list --cask

Available Packages

List

• brew formulae, list all available formulae
• brew casks, list all casks (These two commands are fast cause it's implemented in Bash not Ruby)

Search

# search local installed
brew search --formula keyword
brew serach --cask keyword

# search online available
brew search --formulae keyword
brew serach --casks keyword