Roll your own diceware!
Use your own text sources to create a unique list of familiar words for passphrase generation.
Hotlinked from xkcd, used under a Creative Commons Attribution-NonCommercial 2.5 License.
wordlist add [OPTIONS] [PATH]...
wordlist pick <COUNT>
wordlist help [subcommand]...
wordlist [-V | --version] [-h | --help]
-h, --help Prints help information
-V, --version Prints version information
Add text files to a wordlist file
-o <output> Specify a target wordlist file, defaults to 'word-list.txt'
<PATH>... text files to read into the wordlist. Defaults to reading from the command line if left blank.
Display random words from the wordlist
<COUNT> the number of words to display
Prints this message or the help of the given subcommand(s)