There is a whole set of modules now in the AnyEvent suite:

• AnyEvent::DNS - fully asynchronous DNS resolution
• AnyEvent::BDB - truly asynchronous berkeley db access
• AnyEvent::AIO - truly asynchronous file and directrory I/O
• AnyEvent::DBI - asynchronous DBI access
• AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client
• AnyEvent::FastPing - quickly ping a large number of hosts

Modules that also implement protocols are:

• Net::IRC3 - An event system independend IRC protocol module
• Net::XMPP2 - An implementation of the XMPP Protocol

The great thing is, that you can combine all these protocols and modules in one application or module without threading and without having to choose a specific event loop implementation.

I wrote Net::IRC3 and Net::XMPP2, and was really happy I could shift the choice of the event loop to the actual application programmer, who uses my module, making it a lot more useful (This way even the POE or IO::Async world can benefit from my modules).