These tools are already included in the Brevé source archive but are also available here as separate downloads for convenience (people installing via easy_install will find this is the easiest way to get them).
soup2breve is a new HTML to Brevé converter written by Robert Leftwich which leverages BeautifulSoup for HTML parsing. It does a much better job of converting HTML than html2breve ever did and should be used in place of html2breve whenever possible.
The documentation for soup2breve is here.
html2breve is a Python script that converts well-formed HTML to Brevé. It has a couple minor bugs, but can save tons of time when converting existing HTML resources to Brevé templates. Unless there is good reason, it's recommended to use soup2breve instead.
xsd2breve is a Python script that can take an XML schema definition (xsd) URI and generate a Python module that defines the schema within Brevé (see the documentation on custom tags for more details).
breve_server is a simple WSGI server for previewing Brevé templates without the need to write a bunch of wrapper code or install a web framework. It can also serve static files, so no external webserver is required.