To take courses at a different university you should get in contact with the course coordinator or lecturer first. You need their permission to then be able to register for visiting student/secondary listener at that uni. More information for the registration can be found here for TU and here for HU.

Note: Even when you can access their learning management platforms with your FU-account, you still formally need the registration as visiting student at that university!

Courses from HU or TU can also be taken (especially during the Master's studies) and later getting recognized as courses for our degree here. However, they also offer courses we do not have. So make sure before signing up for them that they can get recognized here by contacting the degree program coordinator first. 

The courses at TU can be found here, those at HU here.

You can find an overview about all courses offered for the current semester in the course catalog. In the header you can filter by semester and dempartment. 

Alternatively, you can find an overview about planned courses for upcoming semesters in the curriculum system MVS. Under the point "Courses" you can search by faculties, department, semester and language. But most courses you can find here are courses from our department.