| packages/nixpkgs/perlPackages.Gtk2Unique | (DEPRECATED) Use single instance applications |
| packages/nixpkgs/perlPackages.ClassDataAccessor | Inheritable, overridable class and instance data accessor creation |
| packages/nixpkgs/perlPackages.MooseXAttributeChained | Attribute that returns the instance to allow for chaining |
| packages/nixpkgs/perlPackages.CatalystComponentInstancePerContext | Moose role to create only one instance of component per context |
| packages/nixpkgs/perlPackages.IOStty | Change and print terminal line settings |