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Stream::Reader is perl module intended for reading data from streams. It can be used for "on the fly" parsing big volumes data.

A generic set of Stream classes for Perl.

String::Approx lets you match and substitute strings approximately. With this you can emulate errors: typing errors, spelling errors, closely related vocabularies (colour color), genetic mutations (GAG ACT), abbreviations (McScot, MacScot). EXTREMELY USEFUL FOR WRITING LANGUAGE TESTS AND QUIZZES ! Jarkko Hietaniemi<jhi@alpha.hut.fi>

Regexp::RegGrp is a Perl modele to group regular expressions to one regular expression.

String::Random is used to generate random strings. It was written to make generating random passwords and such a little easier. See the documentation in pod format in the module for more information.

String::RexxParse is an attempt to provide REXX parsing routines for some long-time REXX programmers.

The "String::Similarity" calculates the similarity index of its two arguments. A value of '0' means that the strings are entirely different. A value of '1' means that the strings are identical. Everything else lies between 0 and 1 and describes the amount of similarity between the strings.

Return::MultiLevel provides a way to return immediately from a deeply nested call stack. This is similar to exceptions, but exceptions don't stop automatically at a target frame (and they can be caught by intermediate stack frames). In other words, this is more like setjmp(3)/longjmp(3) than die.

Rinci is a set of extensible, language-neutral metadata specifications for your code (functions/methods, variables, packages, classes, and so on). It allows various helper tools, from code generator to web middleware to documentation generator to other protocols, to act on your code, making your life easier as a programmer. Rinci also allows better interoperability between programming languages. It is geared towards dynamic scripting languages like Perl, Python, Ruby, PHP, JavaScript, but is not limited to those languages.

Sub::Current makes available a function ROUTINE(), that returns a code reference pointing at the currently executing subroutine. In a special block (BEGIN, END, CHECK, INIT, and UNITCHECK in Perl 5.10) this function will return undef. Outside of a special block (that is, at the top level of a program) ROUTINE() will return undef as well.