QuickField is described as 'Finite Element Analysis package for electromagnetic, thermal, and stress design simulation with coupled multi-field analysis'. There are more than 10 alternatives to QuickField for Windows, Linux and Mac. The best alternative is FEMM. It's not free, so if you're looking for a free alternative, you could try Agros2D or GetDP. Other great apps like QuickField are CarSim (Paid), mbsim-env (Free, Open Source), RoboAnalizer (Free) and MBDyn (Free, Open Source).
Agros2D is a multiplatform C++ application for the solution of partial differential equations (PDE) based on the Hermes2D library, developed by the group of Pavel Karban at the University of West Bohemia in Pilsen.
RoboAnalyzer is a 3D model based software that can be used to teach and learn the Robotics concepts. It is an evolving product developed in Mechatronics Lab, Department of Mechanical Engineering at IIT Delhi, New Delhi, India, under the guidance of Prof. S.K.
RecurDyn is Computer Aided Engineering (CAE) software that is focused on Multibody Dynamics (MBD), while offering multiphysics solutions. The technology behind RecurDyn has superior calculation efficiency because it is based on recursive formulation.