Perl modules

Daemonize:
Proc::Daemon
Proc::Async

Debug:
Debug::Statements
Smart::Comments

Dependencies:
Module::Dependency
Perl::PrereqInstaller
Devel::Modlist
Module::ScanDeps

Dump:
Data::Dumper
Data::Dump

File:
File::Basename
File::Copy
File::Find
File::Path - `rmtree`, create or remove directory trees
File::Spec - operations on file names
File::Temp
Path::Class - path specification manipulation
Path::Class::Rule
File::Slurper - minimal needs
Path::Tiny - average needs
IO::All - overkill

IPC:
IPC::System::Simple - `system`, `capturex`
IO::Capture::Stdout/err - capture stdout/err from Perl statements

Profile:
Devel::Timer
Devel::NYTProf

Test:
Test::More
Test::Class
Test::Unit::TestCase
Devel::Cover
Test::Mock::Signature
Test::WWW::Mechanize::PSGI
Test::Power

Validation:
Validator::LIVR

WebSocket:
Protocol::WebSocket