It has become confusing to follow the rapidly increasing number of new developments in all kinds of desalination processes and equipment throughout the world by different R&D institutes and manufacturers. This article briefly describes some developments in desalination by the following distillation processes: vertical tube foam evaporator (VTFE), vapour compression evaporator (VC), horizontal aluminium tube multiple effect evaporator (HATME), falling film multi-stage evaporator (FF-MSF), direct contact condensation (DCC), multi-effect stack evaporator (MES), multi-stage controlled flash evaporator (MSCF), multi-stage flash fluidized bed evaporator (MSF/FBE). The multi-stage flash evaporation (MSF) process is the reference for the description of the developments mentioned. Significant factors for evaluation summarized in three tables, are: investment or capital costs, energy costs, operating and maintenance costs.