The VSys One, VSys Kiosk and VSys Lite desktop applications are written in Delphi.
VSys Web (the manually synchronized, older version) is written in Ruby on Rails.
VSys Live, VSys Live Kiosk, VSys Anywhere, and VSys Web Advanced are written in Ruby on Rails and JavaScript, using a middleware layer (VOXI) written in Delphi which provides all of the VSys One business logic.