Sensor Watch project gets a lot of mileage out of the Casio F-91W display. People have implemented Chrome's jumping dinosaur game on it. At some point they made a custom LCD that's even more capable.

The one that is labeled as “German” is similar to, but noticeably different from, the hardware display actually in use on Berlin underground trains. The real one has proper descenders, and also has narrow i/t/l and wider m/w (that is, it's not monospace). Alas, the provided link 404s as well.