slkvm is an application to provide some system tools to work with clustering and virtualization. It focuses on depending on as few external tools as possible but to also support as many virtualization technologies as possible. It works in a cluster environment where heartbeat runs virtual machines of nodes that have failed. It builds an "unheaded" cluster to avoid having a clear point of failure. It is able to build a two node cluster with everything redundant. It avoids compiling a new kernel or newer version of applications, so you can benefit from Debian security updates.
What's My Heart Rate allows you to measure your heart rate by just looking at your screen. It's easy and convenient, without the need to press your finger on your camera lens. Your heartbeat causes micro color changes on your face. What's My Heart Rate uses the front camera and a software algorithm to detect these micro changes, with beat-to-beat accuracy. The algorithm is based on the non-contact photoplethysmography concept.