Mnemonic Ninja is a website written in Go that converts numbers to words
and back to aid in memorization. There are other mnemonic major converters,
but most perform conversions based on each letter instead of taking
pronunciation into account. Mnemonic Ninja uses a phonetic alphabet so that
conversions line up with the generally accepted rules.
See the Mnemonic Ninja about page
or the mnemonic major system Wikipedia page
for more information.