SandBoxie serves as a shield against malicious actions of potentially dangerous programs.
The possibility of running programs that are not compatible with the existing OS is now allowed with Virtual PC which creates distinct virtual machines on a single computer.
VirtualBox is an easy and elegant solution for those who want to control a computer from another computer.
Sharing data between host computer and virtual machine is very much possible with VMware Player which makes all very easy.
VMware Server allows server virtualization by sharing a physical server into multiple virtual machines.
KiTTY is a version of the PuTTY SSH client for connecting to remote servers using the SSH-1 protocol, SSH-2, Telnet and Rlogin using or not a proxy.
BlueStacks App Player is a simple tool for running favorite mobile apps and games in full screen directly in your computer browser.