Information on seminars and language courses at German universities is provided by the German Academic Exchange Service (DAAD).
You can obtain further information on German courses (worldwide) from the Goethe-Institut (www.goethe.de/en) and its more than 100 offices abroad.
Deutsche Welle, a German broadcasting station, offers news in easy German as well as online courses for different learning levels.
The Deutscher Volkshochschulverband e.V. offers German courses in many German cities as well as online courses.
Are you are interested in a language stay in Germany? You can find courses offered by the members of the Fachverband Deutscher Sprachschulen und Sprachreise-Veranstalter e.V. (FDSV) in the database https://fdsv.de/en/startseite-en/. All courses are in accordance with the European quality standard EN14804.