brew

$ brew search httpie
$ brew search cask

$ brew install httpie # if just a command
$ brew cask wewechat # if is an app

$ brew outdated

$ brew upgrade # upgrade all packages
$ brew upgrade httpie # update specific package

$ brew update # update brew local mirror

$ brew cleanup # delete old and cache files
$ brew cleanup -n # list what will be cleaned up

$ brew home httpie # visit httpie's homepage

$ brew list

$ brew info httpie