Stcky footer Less. http://headacheofacodemonkey.net/less-sobre-bootstrap/

sticky_footer.less

@altura-footer: 56px;
 
html, body {
    height: 100%;
    //margin: 0;
    //padding: 0;
}
 
#wrap {
    min-height: 100%;
    height: auto !important;
    height: 100%;
    margin: 0 auto -@altura-footer;
}
 
#push, #footer {
    height: @altura-footer;
}
#footer {
    background-color: #f5f5f5;
}
 
/* Lastly, apply responsive CSS fixes as necessary */
@media (max-width: 767px) {
    @margen-correccion: 20px;
    #footer {
        margin-left: -@margen-correccion;
        margin-right: -@margen-correccion;
        padding-left: @margen-correccion;
        padding-right: @margen-correccion;
    }
}