| perl5Packages.TestOutput | Utilities to test STDOUT and STDERR messages |
| perl5Packages.IOTee | Multiplex output to multiple output handles |
| perl5Packages.IPCRun3 | Run a subprocess with input/output redirection |
| perl5Packages.IOAIO | Asynchronous/Advanced Input/Output |
| perl5Packages.SGMLSpm | Library for parsing the output from SGMLS and NSGMLS parsers |
| perl5Packages.TestTrap | Trap exit codes, exceptions, output, etc |
| perl5Packages.IOCapture | Abstract Base Class to build modules to capture output |
| perl5Packages.AppXMLDocBookBuilder | automated builder from DocBook/XML to its output formats (e.g XHTML5 or PDF) |
| perl5Packages.TextTabularDisplay | Display text in formatted table output |
| perl5Packages.ImageOCRTesseract | Read an image with tesseract ocr and get output |
| perl5Packages.PHPSerialization | Simple flexible means of converting the output of PHP's serialize() into the equivalent Perl memory structure, and vice versa |
| perl5Packages.LogHandler | Log messages to several outputs |
| perl5Packages.LogDispatch | Dispatches messages to one or more outputs |
| perl5Packages.CatalystPluginLogHandler | Log messages to several outputs |