Use the omniglot dataset.
github.com/unixpickle/omniglot has limited data (2/6 signals) — verify manually before use
Get this data programmatically — free, no authentication.
curl https://depscope.dev/api/check/go/github.com/unixpickle/omniglotLast updated · 2017-09-10T07:01:15Z