OmNomNom currently supports more than 50 canteens in Berlin (Germany) and plans to support more canteens in different cities.
OmNomNom is really easy to use. You can talk to it directly or invite it to a group. Just start typing a message beginning with a
/ to get auto completion suggestions (e.g.
/tu_mensa) for different canteens.
OmNomNom is not only free to use but is also developed as free and open source software. You can check out the full source code at GitHub.