The mitmproxy forums are the right place to ask questions about using mitmproxy, propose changes to the project, and talk about the project as a whole.
Please report bugs on the Github issue tracker.
The mitmproxy developers use Slack to co-ordinate. Feel free to join us to chat, but keep support/how-to questions to the forums.
A privacy analysis and measurement service, built using mitmproxy - an example of a high-performance server-side application of the project.
A mitmproxy based devtools extension that lets you edit remote files locally and serve them directly to Chrome.
BackDoorFactory + mitmproxy - patch binaries with shell code on the fly.