Tridium/Niagara AX is the leading supplier-agnostic integration software for building automation. It's huge and it's QNX. Air-handlers, fluid-coolers, chillers

Tridium/Niagara AX is the leading supplier-agnostic integration software for building automation. It's huge and it's QNX. Air-handlers, fluid-coolers, chillers, etc., are now frequently powered by a JACE (an embedded controller running the Niagara platform on the QNX Neutrino microkernel). JACEs are used to handle integrating BACnet equipment and coordination across sites. It's quietly becoming the standard way to do things if you're not just going to hand Honeywell or Trane a million dollars and hope things turn out ok.