Here's my list: Log::Dispatch - Set up logging to one or more outputs, each of which can have their own filters. Devel::StackTrace - OO stack traces mostly written for ... Exception::Class - Allows you to declare arbitrarily complex exception class hierarchies in your modules. Also has a base exception object implementation. Thesaurus - Maintains relations between scalars so you can say that 'cat', 'kitten', & 'kitty' are related. Then later, if you give it 'cat' it'll give you all three. Includes persistence subclasses for saving to a DBM or a File. HTML::Mason - I'm on the core team for this one. This is more of an app than a module, though. I'm considering writing a Tie::RestrictedHash to sort of emulate what you can do with a pseudo-hash but we'll see. -dave