A homebrew tap for installing some programs I've written.
brew tap ctdk/ctdk
Then, install the program you want with brew install <formula>.
You could also install a program with brew install ctdk/ctdk/<formula>, or via URL (but doing that way won't get updates) with brew install https://raw.githubusercontent.com/ctdk/homebrew-ctdk/master/<formula>.rb.
Read more at the homebrew tap documentation.
brew help, man brew or check Homebrew's documentation.