The University of Applied Sciences Erfurt has an online timetable: Publish
Each participant can arrange his own timetable view and also use it in his calendar.
On the main website, under "startsite > students > online services" you can find an explanation on how to use the software:

Link to Online-Services, with instructions

Please read the instructions first or download the ODF before you use Publish for the first time.
If you feel familiar with the application you can use it directly.

direct Link to Publish