Please go to the Campus & Facility Management website where you can find more information about organizing your own activity.
Contact your M&C contact person.
De UT has good experiences with the association congress.nl. They offer all kinds of services. More information is available via www.congress.nl.
There are different kind of tools available that you can use during your events. For example voting-systems or tweets ons screens during a conference. More information about voting-systems is available via www.voxvote.com. Would you like to ask questions and show them on a central screen, visit the page https://socialqa.com. More information about showing tweets with a certain # hashtag on a screen go to www.utwente.nl/en/socialmedia (Guidelines > During events).