Features I could use:
- Selectors - I already thought about an own alias function for the annoyingly verbose document.getElementById.
- Position for centering divs properly. Also maybe for some other things.
- Tabs - I already have an implementation of a tabbed container for the chat, but maybe I could make it better with JQuery.
- Drag & Drop - For inventory handling and putting spells into the quick bar
- Sortable for inventory handling (maybe)
- Resizable GUI windows