A drop down menu showing the full path/name for each open file, allowing the width to go all the way across the monitor. Click on an item and that file becomes the focused tab. Actually with this you wouldn't even need the tab bar & it would be nice if we could turn it off.
Have you tried the document list in the sidebar? You can turn tabs off see preferences.
A command line option that causes the file to be opened in a new window.
`geany -i filename`