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File::Flock is a wrapper around the flock() call. The only thing it does that is special is that it creates the lock file if the lock file does not already exist. It will also try to remove the lock file. This makes it a bit complicated.

File::HomeDir::PathClass is just a wrapper around File::HomeDir methods, transforming their return value to Path::Class objects. This allows for easier usage of the value. Refer to File::HomeDir#METHODS for a list of which functions are supported. File::HomeDir::PathClass supports both original File::HomeDir interfaces.

Gearman provides a generic framework to farm out work to other machines or dispatch function calls to machines that are better suited to do the work. It allows you to do work in parallel, to load balance processing, and to call functions between languages. It can be used in a variety of applications, from high-availability web sites to the transport for database replication.

It monitors files in a given directory (or set of directories), such as Apache log files in /var/log/httpd, and as the log files are written to, takes the changes and sends them to a running instance of the Scribe logging system.

Forest is intended to be a replacement for the Tree::Simple family of modules, and fixes many of the issues that have always bothered me about them. It is by no means a complete replacement yet, but should eventually grow to become that.

CityHash provides hash functions for strings. The functions mix the input bits thoroughly but are not suitable for cryptography. See "Hash Quality," below, for details on how CityHash was tested and so on. Functions by CityHash: - CityHash32() returns a 32-bit hash. - CityHash64() and similar return a 64-bit hash. - CityHash128() and similar return a 128-bit hash and are tuned for strings of at least a few hundred bytes. Depending on your compiler and hardware, it's likely faster than CityHash64() on sufficiently long strings. It's slower than necessary on shorter strings, but we expect that case to be relatively unimportant. - CityHashCrc128() and similar are variants of CityHash128() that depend on _mm_crc32_u64(), an intrinsic that compiles to a CRC32 instruction on some CPUs. However, none of the functions we provide are CRCs. - CityHashCrc256() is a variant of CityHashCrc128() that also depends on _mm_crc32_u64(). It returns a 256-bit hash. All members of the CityHash family were designed with heavy reliance on previous work by Austin Appleby, Bob Jenkins, and others. For example, CityHash32 has many similarities with Murmur3a.

Git::Version::Compare contains a selection of subroutines that make dealing with Git-related things (like versions) a little bit easier. The strings to compare can be version numbers, tags from git.git or the output of git version or git describe. These routines collect the knowledge about Git versions that was accumulated while developing Git::Repository.

Google Protocol Buffers is a data serialization format. It is binary (and hence compact and fast for serialization) and as extendable as XML; its nearest analogues are Thrift and ASN.1. There are official mappings for C++, Java and Python languages; this library is a mapping for Perl.

This class simplifies the handling of keyword argument lists. It replaces Class::AutoClass::Args. See "DIFFERENCES FROM Class::AutoClass::Args" for a discussion of what's new. See Hash::AutoHash::Args::V0 for a subclass which is more compatible with the original.

IO::String is an IO::File (and IO::Handle) compatible class that reads data from or writes data to in-core strings. It is essentially a simplification of parts of the IO-stringy collection of modules. As such, IO::String is a replacement for IO::Scalar.