We need much more than this, but here are areas where developers can help. Please edit this page when items are finished. Another place for developers to start is with the issues list.
* Turn top-level Apps menu into an Apps page - which will probably require App plugins to have icons. Add documentation specifically to the plugin/addon documentation for creating apps. Add links to the App Store (which doesn't currently exist).
* Extend WebDAV to provide desktop access to photo albums
* service classes - provide a pluggable subscription payment gateway for premium accounts
* service classes - account overview page showing resources consumed by channel. With special consideration this page can also be accessed at a meta level by the site admin to drill down on problematic accounts/channels.
* Events module - bring back birthday reminders for friends, fix permissions on events, and provide JS translation support for the calendar overview; integrate with calDAV
* replace the tinymce visual editor and/or make the visual editor pluggable and responsive to different output formats. We probably want library/bbedit for bbcode. This needs a fair bit of work to catch up with our "enhanced bbcode", but start with images, links, bold and highlight and work from there.
* Create mobile clients for the top platforms - which involves extending the API so that we can do stuff far beyond the current crop of Twitter/Statusnet clients. Ditto for mobile themes. We can probably use something like the Friendica Android app as a base to start from.
* Family Account creation - using service classes (an account holder can create a certain number of sub-accounts which are all tied to their subscription - if the subscription lapses they all go away).
In many cases some of the work has already been started and code exists so that you needn't start from scratch. Please contact one of the developer channels like Channel One (one@zothub.com) before embarking and we can tell you what we already have and provide some insights on how we envision these features fitting together.