Toolatra is a micro web framework that’s similar to Sinatra which allows you to write HTTP Tcl applications. It offers a built-in template and layout engines, a built-in web server, and a module to handle and validate tokens. It may seem like a limited framework but it gets the job done and it’s very good at it. 

A microframework is a term used to refer to minimalistic web application frameworks. It is contrasted with full-stack frameworks.