Extensions on mediawiki.org are not very well organized and finding the right extension is often difficult. The community needs better management of extension pages with categorization, ratings on code quality, security, usefulness, ease of use, etc. Good extensions should be given more visibility. “Featured extensions” similar to featured articles could be introduced. The compatibility of extensions with different MediaWiki versions should be clearly displayed and possibly compatibility testing should be automated. In terms of implementation, some suggest using SMW for the organization of the data and Article Feedback for rating. Developers should be able to add a PayPal account link to fund the maintenance of their extensions.
Note: This project should probably be implemented by someone with a lot of experience with MediaWiki. An intern could work on pre-implementation work such as collection of requirements and detailed design/specification.
This is a proposal made by Mariya Miteva at http://www.mediawiki.org/wiki/Mentorship_programs/Possible_projects#A_proper_catalog_of_extensions while she was working on https://www.mediawiki.org/wiki/Third-party_MediaWiki_users_discussion as part of her Outreach Program for Woman internship.
Recovering it here to see if there is community consensus on the need and we can shape a proposal for a volunteer.