In reply to andypoole:
One main question is how such a site is being updated when a new version is published. With risc-os.net you can include comments in your website, or an xml file on your website and when you update your site with the new app version and in that run update the html comments or xml file risc-os.net is updated automatically so that there is no need to update the app catalog by going there too which is the most worthwhile feature I think. Furthermore risc-os.net checks the websites and if they are not reachable for some time drops them to avoid dead links.
XML support for RISC OS Justin-credible Fletcher ports to RISC OS the software required to use and create popular XML document files 5 comments, latest by diomus on 17/9/01 12:00PM. Published: 14 Sep 2001