passphrase-generator is a fully open-source passphrase generator written in c using /dev/random as the source of randomness. it uses this wordlist of 65536 different words, and was sourced from this repo.
the generated binary (by default it's <project_folder>/build/passphrase-gen) will generate a 5 word long passphrase.
for info on extra options run <project_folder>/build/passphrase-gen -h
to build on linux systems with gcc installed run:
git clone https://github.com/Tape-Dispenser/passphrase-generator
cd ./passphrase-generator
gcc -o ./build/passphrase-gen gen.c ./lib/map.c