Web2.0-development both server side and client side.
Python (Django, tornado, virtualenv, pip, Fabric);
HTML and CSS (up to HTML5 and CSS3);
XML and related technologies (DOM, XMLSchema, XSL, XForms, SOAP, XUL (Mozilla apps));
HTTP (Apache, Nginx, SSL);
Version control systems: Mercurial, Git, Subversion;
English: enough for interacting in written and verbal form.