Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
VirtualBox - VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as...
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
QEMU - QEMU (short for "Quick EMUlator") is a free and open-source hosted hypervisor that...
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
Proxmox VE - Proxmox is an open-source server virtualization management solution that offers the ability to manage virtual server technology with the Linux OpenVZ and KVM technology.