Hi,
I started working on support for reading Exuberant Ctags files. The commit message sums up most of the details I hope. If anyone wants to try it out and/or review the code, that would be much appreciated.
The relevant commit is here on my 'ctags-support' branch: https://github.com/codebrainz/geany/commit/a642077c47ea444e9b13b9d2ad244be08...
Or the attached patch has the same information.
I haven't tested a whole lot but it seems to be working well, allowing colourizing of the tags and auto-completion. It doesn't (yet) get the arguments list for functions (haven't found a clean way yet), so the calltips for function tags are pretty useless.
There is still much to be done, but it's a good start.
Cheers, Matthew Brush