Twisted Alternatives
Twisted is described as 'event-driven network programming framework written in Python and licensed under the MIT License. Twisted projects variously support TCP, UDP, SSL/TLS, IP Multicast, Unix domain sockets, a large number of protocols (including HTTP, XMPP, NNTP, IMAP, SSH, IRC, FTP' and is an app in the development category. There are four alternatives to Twisted for a variety of platforms, including Linux, Mac, Windows, BSD and Chrome OS. The best alternative is Node.js, which is both free and Open Source. Other great apps like Twisted are Opa, asyncoro and NoPrint.js.
Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications.
Opa is an open source, simple and unified platform for writing web applications. All aspects are directly written in Opa: Frontend code, backend code, database queries and configuration. And everything is strongly statically typed.
asyncoro is a Python framework for developing concurrent, distributed programs with asynchronous completions and coroutines. Asynchronous completions implemented in asyncoro are socket I/O operations (non-blocking sockets), database cursors, sleep timers and locking primitives.
NoPrint.js is a small and neat open source JS library that disables print, screenshot, copy and paste functions in HTML. You can also enable the AutoBlur option to let the content turn to blur once the mouse leaves the webpage.