Turtl is an HTTP proxy
Turtl is an HTTP proxy whose purpose is to Throttle connections to specific hostnames to avoid breaking terms of usage of those API providers (like del.icio.us, technorati and so on).

The proxy can be used either as a library embedded in another application or it can be started stand-alone using the provided twistd plugin. you can free download Turtl 0.0.2 now.