Seminarevaluationen
If you would like to evaluate individual seminars or other events in addition to other university or faculty-wide evaluations, you can use UHH services for this, which also guarantee the anonymity of the participants.
Particify (in german,RRZ) is suitable for simple evaluations of didactics or even inhuman questions. In this tool, you can create quiz-like questionnaires that go through a questionnaire in a simple, appealing design, with many presets, which can be answered by the students.
More ambitious is the tool LimeSurvey (in german,RRZ), which offers a more extensive statistical evaluation and the possibility of data export. There is some scope here for more comprehensive evaluations.