This package generates passphrases in the style of Reinhold's Diceware. It uses a variant of his 8k word list.
The Go code here is in the public domain, see LICENSE for details. The word list itself is derived from Reinhold's about which he says:
To the extent that a word list is protected by copyright, A G Reinhold licenses its rights to the English Diceware Wordlist under the Creative Commons CC-BY 4.0 license.