An add on for Catalyst realizing the CRUD (CReate Update Delete) operations over a Catalyst model is a frequent subject of discussion at the mailing list and catalyst IRC rooms.
Read this thread for a comparison of the projects.
InstantCRUD. This project was in limbo for a long time - but a new version is uploaded to CPAN. The new feature will be enabling editing of related records together in one form (like for example editing addresses linked to an account together with that account's own data). I also offloaded a lot of functionality to external modules - so it is a lot more lightweight.
CatalystX::CRUD
CatalystX::CRUD provides a simple and generic API for Catalyst CRUD applications. CatalystX::CRUD is agnostic with regard to data model and data input, instead providing a common API that different projects can implement for greater compatibility with one another. Version 0.30 news.
Catalyst::Plugin::AutoCRUD is an "Instant AJAX web front-end for DBIx::Class, using Catalyst." It differs from other CRUD systems in that it doesn't scaffold pages for you to then edit - it generates the user interface directly, and on the fly, never storing it to disk. This is why it's a Plugin for your live app. See the autocrud support page in this wiki.
Other interesting modules:
Read this thread for a very good recent discussion of CRUD, REST and RPC API issues.
Catalyst::Controller::DBIC::API provides both REST and RPC APIs to your DBIx::Class Models.
Catalyst::Action::RESTController::REST implements a mechanism for building RESTful services in Catalyst. It does this by extending the normal Catalyst dispatch mechanism to allow for different subroutines to be called based on the HTTP Method requested, while also transparently handling all the serialization/deserialization for you.
Catalyst::
Catalyst::Enzyme hasn't seen an update in more than two years. In the rapid changing world of Catalyst, I think it's safe to say that it's dead by now.
(As the author, I recommend you choose another module. /Johan)
CatalystX::ListFramework::Builder has been deprecated in favourfavor of the newer Catalyst::Plugin::AutoCRUD, so you are recommended to use that instead.