A DisplayPort adapter is used e.g. for connecting a PC with a HDMI output to a monitor with DisplayPort.
Displayport and KVM switches
Displayport switch boxes and cables, for e.g. connection of multiple computers with VGA to a single monitor. Also known as KVM switches with mouse/keyboard switching.
Displayport splitter / distribution
Split boxes for Displayport signals for distribution of the same image to many screens, info boards or simply both screen and projector at the same time.