What sort of things are you looking for in catalog plugin that differs from an items manager? I ask this because I thought that Items Manager and I18N Special Pages are both flexible enough for those ends. If not, I had been aching to write a tutorial on how to use DM Matrix to develop a bespoke blog plugin and items manager (once the CUsers plugins were published), so if you specify any particular features that are needed, they can be included in the writeup.
Also as an update: I've been working on the CUsers core this week and it's basically finished now, with CodeMirror support for the back-end HTML/PHP editing. The progress made it less compatible with the message board, PM system and comments plugin, so I'm currently trying to bring those all up to speed so that they can be released simultaneously.
Also as an update: I've been working on the CUsers core this week and it's basically finished now, with CodeMirror support for the back-end HTML/PHP editing. The progress made it less compatible with the message board, PM system and comments plugin, so I'm currently trying to bring those all up to speed so that they can be released simultaneously.