That presentation aims at giving a technical overview on virtualisation and cloud computing, mainly focusing on open source solutions. The plan could as following. 1. Set up of virtualisation stack (host and guest) on a desktop 1.1. VirtualBox 1.2. virt-manager/libvirt (with Xen and KVM/QEMU) 1.3. Xen/OpenXenManager 2. Set up of virtualisation stack (host and guest) on a (display-less) server 2.1. VirtualBox (not sure it's doable) 2.2. virsh/libvirt (with Xen and KVM/QEMU) 2.3. Xen/OpenXenManager (remote controlling Xen) 3. Set up of a cloud front-end, for a local cloud and for a remote cloud 3.1. Eucalyptus 3.2. OpenStack 3.3. Aeolus (http://www.aeolusproject.org/) 3.3. OpenNebula 3.4. Nimbus 3.5. CloudStack 3.6. oVirt 4. Set up of some PaaS, for instance, Django Web applications 4.1. AppScale 4.2. OpenShift