Q-Tubes is a Web-based QEMU/KVM machine manager in Python built around the Pyramid Web framework. Its goal is to allow management of QEMU/KVM networks across single host instances, and ultimately across server farms. It supports minimal VM instances with disk support and basic network configuration (no user-space network yet), and basic VDE switch configurations. It provides a WSGI interface for deployment behind WSGI-aware servers, or provides its own basic server (python-waitress) for simple instances. The application is under steady development and has a moderate number of (Python) dependencies. Installation in a virtualenv is strongly recommended. It requires QEMU/KVM, VDE, and Python 2.7 or later.