Your results contain 6 solutions with the following criteria :

Virtualisation
Solution Smile rating Users rating Popularity
KVM KVM 4.2 Smile No rating
69%   Popularity on the site
OpenVZ OpenVZ 3.2 Smile No rating
30%   Popularity on the site
Oracle VirtualBox Oracle VirtualBox 3.5 Smile 3.2 Visitors
33%   Popularity on the site
Proxmox VE logo Proxmox VE 2.5 Smile 4.0 Visitors
41%   Popularity on the site
Qemu No rating 5.0 Visitors
57%   Popularity on the site
XEN Xen 4.0 Smile 4.1 Visitors
42%   Popularity on the site