Sitix is still a pretty young piece of software, so if there's a missing feature that isn't on this list, don't hesitate to submit a feature request on the issues page.
Alternatively, you could just write it yourself! This TODO list is mostly for my memory, but I would love codebase contributions to get some things crossed off.
- Markdown support with an @-directive
- Code cleaning (need to fix memory management especially)
- Make config less hack (move from [i config] to [i exists], and create empty objects on global with -c)
- Add an unpack/ghost operator so setting objects to other objects works (something like [=ghostingName-] [%ghostedObject] [/])