Mojolicious is "Duct Tape For The HTML5 Web". It is powerful with no dependencies out of the box with RESTful routes, plugins, Perl-ish templates, session management, signed cookies, a testing framework, a static file server, I18N, first class Unicode support, and much more. It has a very clean, portable, and object oriented pure Perl API without any hidden magic and no requirements besides Perl 5.10.1. It has a full stack HTTP 1.1 and WebSocket client/server implementation with TLS, Bonjour, IDNA, Comet (long polling), chunking, and multipart support. It has a built-in async I/O Web server supporting EV pluggable event queue, Unix domain sockets, and hot deployment, perfect for embedding. Automatic CGI, FastCGI, and PSGI detection for any deployment situation. It has a JSON and XML/HTML5 parser with an advanced CSS3 selector support. The code is based upon years of experience developing Catalyst.
File-Find-Object-Rule is a port of File-Find-Rule to make it use File-Find-Object instead of File::Find. It provides a succinct, declarative syntax for creating directory tree traversal routines while enjoying the advantages of File-Find-Object, such as traversing the tree incrementally and iteratively, and the capability of instantiating several traversers in the same program.
AnyEvent provides an identical interface to multiple event loops. This allows module authors to utilize an event loop without forcing module users to use the same event loop (as only a single event loop can coexist peacefully at any one time). The interface itself is vaguely similar but not identical to the Event module. On the first call of any method, the module tries to detect the currently loaded event loop by probing for an already-loaded event loop, such as Glib or Event. The first one found is used. If none is found, the module tries to load an event module, and failing that, it will fall back to an optimized pure Perl implementation.
Device::ParallelPort is a Perl API that allows low level access to the parallel port of most computers. It does this by using a number of drivers, which can be customized and added to, including Linux (direct and parport), Win32, Script, Dummy, and more. It also contains a number of direct access devices including an example printer and a relay controller card.