I've been having a wonderful time spinning up small projects using Tcl, Wapp, and Sqlite. Tcl's quoting rules makes it really easy to embed HTML (or anything else, really) inline within a procedure. Simple example:

    # available at /style.css
    proc wapp-page-style.css {} {
        wapp-mimetype text/css
        wapp-cache-control max-age=3600
        
        wapp-trim {
            body {
                background: aliceblue;
            }
        }


    }

    # available at /hello
    proc wapp-page-hello {} {
        wapp-trim {
            <html>
            <head>
                <link href="%url(style.css)" rel="stylesheet">
            </head>
                <body>
                    <h1>Hello HN!</h1>
                </body>
            </html>
        }
    }