Bochs (box) is a portable IA-32 and x86-64 IBM PC compatible emulator and debugger mostly written in C++ and distributed as free software under the GNU Lesser General Public License. Developed by http://bochs.sourceforge.net/
License: Open Source
Bochs is an open-source emulator suitable for educational purposes and testing various operating systems, while VMware vSphere Hypervisor is a robust, enterprise-grade virtualization solution designed for performance, scalability, and comprehensive management in production environments.