BeGeistert BeGeistert is a bi-annual BeOS users conference . In recent years , it has however become a developers conference for both Haiku and YellowTAB ZETA . The conference has been held in Düsseldorf , Germany , every April and October , excepting its first outing in December of 1998 . The 14th BeGeistert was held in Düsseldorf on April 2-3 , 2005 . The standard organisation of the event , in recent years , has involved a demonstration by one of the European BeOS software vendors , such as YellowBites , along with a coding demonstration , and a demonstration by one or both of Haiku and YellowTAB. Other events vary year to year . In the past , coding challenges at the event have produced the first localisable version of OpenTracker . External link BeGeistert homepage Categories : BeOS 