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One recurring problem in modules that use Scalar::Util's weaken function is that it is not present in the pure-perl variant. While this isn't necessarily always a problem in a straight CPAN-based Perl environment, some operating system distributions only include the pure-Perl versions, don't include the XS version, and so weaken is then "missing" from the platform, despite passing a dependency on Scalar::Util successfully. Most notably this is RedHat Linux at time of writing, but other come and go and do the same thing, hence "recurring problem". The normal solution is to manually write tests in each distribution to ensure that weaken is available. This restores the functionality testing to a dependency you do once in your Makefile.PL, rather than something you have to write extra tests for each time you write a module. It should also help make the package auto-generators for the various operating systems play more nicely, because it introduces a dependency that they have to have a proper weaken in order to work.

SVN::Simple::Edit wraps the subversion delta editor with a perl friendly interface and then you could easily drive it for describing changes to a tree. A common usage is to wrap the commit editor, so you could make commits to a subversion repository easily.

SVN::Statistics - perl module to create subversion statistics

SVN::Web provides a web interface to subversion repositories. You can browse the tree, view history of a directory or a file, see what's changed in a specific revision, track changes with RSS, and also view diff. SVN::Web also tracks the branching feature (node copy) of subversion, so you can easily see the relationship between branches.

Term::ANSIScreen is an Term::ANSIColor clone with support for screen mode, cursor control and keyboard mapping sequences.

Sah is a schema language for validating data structures. In the 0.9.0 series, there will probably still be incompatible syntax changes between revision before the spec stabilizes into 1.0 series.

Unlike the tie-based Data::Lazy, this module operates on values, not variables. Therefore, assigning into $dv and $lv above will simply replace the value, instead of triggering a STORE method call. Also, thanks to the overload-based implementation, this module is about 2x faster than Data::Lazy.

This module calls an external editor with an optional text message and returns what was input as a file handle. By default, the EDITOR environment variable will be used, otherwise vi.

Scalar::Does has long been noted that Perl would benefit from a does() built-in. A check that ref($thing) eq 'ARRAY' doesn't allow you to accept an object that uses overloading to provide an array-like interface.

This module lets you defer actions at run-time that will take place when the control flow returns into an upper scope. Currently, you can: * hook an upper scope end with "reap" ; * localize variables, array/hash values or deletions of elements in higher contexts with respectively "localize", "localize_elem" and "localize_delete" ; * return values immediately to an upper level with "unwind", and know which context was in use then with "want_at".