Kiln, previously known as xMod, is an open source multi-platform framework for building and deploying complex websites whose source content is primarily in TEI/XML. It brings together various independent software components into an integrated whole that provides the infrastructure and base functionality for such sites. Separation of roles is central to Kiln's design, allowing people with different backgrounds, knowledge and skills to work simultaneously on the same project without interfering with one another’s work. Developed and maintained at King’s College London it has been used to generate more than 50 websites for digital humanities research projects which have very different source materials and customised functionality.