The probmodels website is built on Movable Type 4, using custom templates to generate (at the time of this writing) valid HTML5 and (excluding vendor-specific extensions) CSS3.
All markup, stylesheets, Javascript, and (non-personal) images were created by Trevor Fountain, and are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 2.5 UK: Scotland license. Source code is available via git.
Hosting is provided by the School of Informatics server for research groups.