I see that the treebrowser plugin has been orphaned. I'd like to take over as an active maintainer, since I'd like to see this plugin survive. I've just sent a pull request to add me to the MAINTAINERS file.
The treebrowser is for those of us who want a richer set of file manager operations than is provided by Geany's built-in file browser plugin. That means creating, deleting, renaming files and so on. The treebrowser seems a bit buggy and unstable at the moment, so my most immediate goal is to return it to stability. I'd also like to shorten the context menu and make the treebrowser more polished and usable in general. Finally it would be nice to support fancier operations such as drag and drop someday, time permitting. :)
Comments and suggestions are welcome. Thanks!
adam