Downloading ZplToWpl 1.0.2 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. This free program was originally designed by CodePlex. The program's installer file is generally known as ZplToWpl.exe. We recommend checking the downloaded files with any free antivirus. The most popular version among ZplToWpl users is 1.0. The program lies within Multimedia Tools, more precisely Editors & Converters.
From the developer:
Converts Zune playlists (.zpl) to Windows Media Player/Windows Media Center (.wpl) compatible playlists.
Microsoft's free Zune software is a great tool for managing your music collection. It provides direct support for Zune devices and direct access to Microsoft's online music marketplace. For ~$15 a month you have access to unlimited music downloads and 10 DRM free downloads every month.
You may want to check out more software, such as Taggin' MP3, Hit-Recorder or Sothink DVD to iPod Converter, which might be related to ZplToWpl.