dolt is a cross platform HTML preprocessor, which replaces specially formatted HTML comments with the contents of another file. It works much the same way as SSI, but without the server requirements, as files are processed before they are uploaded to a Web server. For example, it allows you to update a menu on every page by changing one file. This gives you some of the benefits of frames without any of the problems.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.