Which language are you using? Text editors like ST usually rely on third party tools like ctags to do the indexing (which is the hard part).

In fact, there seems to already be a Sublime Text plugin that uses ctags to offer a function list: https://github.com/SublimeText/CTags. It apparently shows the tags in the file tree instead of in a separate pane, which some people may not prefer. But it sounds like basically what ozh wants.

Files are correctly parsed, .tag files are correctly generated, but for the life of me I cannot display anything anywhere.

Edit: although the "navigate to definition" feature is quite neat

SublimeCodeIntel (mostly) works: https://github.com/SublimeCodeIntel/SublimeCodeIntel

I use it every day, and the only real issue for me is that occasionally the built-in suggestions override CodeIntel's, which is kind of annoying.

That's not what I need. I'm used to having a list of all functions / declaration in the current file, always visible, and I just can't live without it.

For functions there's cmd-R. Declarations I'm not sure though, I think this would need a language specific plugin.

One thing though, cmd-R doesn't work very well with closures, it gets a bit messy - the good thing is that you can just start typing words you know from the function's name and it will list anything relevant.

Could you provide a link to a screenshot/example of what you're talking about. I understand the gist of what you're describing; I believe I've been looking for the same thing.

The Vim plugin Tagbar matches ozh’s description. The Tagbar site has some screenshots: http://majutsushi.github.io/tagbar/.

An equivalent plugin would be harder to implement in Sublime Text, because Vim has identification of “tags” (function/class names) built-in, and the Tagbar plugin just displays them. I don’t think Sublime Text’s syntax highlighting rules do any equivalent thing. So a Tagbar-like plugin might need to parse the code itself to identify tags.

I'm used to something like this: http://i.imgur.com/gAQhd.png and I have a very hard time not using it (function list on the right). When hovering a function you also get a hint on parameters.

Can be moved to the right:

http://www.geany.org/uploads/Gallery/geany_vte.png