You mean aside from Unix::PasswdFile, Passwd::Solaris and Passwd::Linux, or AnyData::Format::Passwd?

Or the built-in getpwent and friends? (Which has the benefit of probably honoring the local system's NIS or other remote password source)

Nope. nothing.

Update: OK, those middle two are for adding and removing new entries from the corresponding OS' passwd files rather than parsing out contents so they probably don't count as "parsing passwd" modules.