Sublime Text 2 plugin for inserting \ref{<reference string>} code into LaTeX documents. The plugin scans the file for \label{<reference string>} commands (ignoring those in commented out lines), and presents a drop-down list of <reference string> options, alphabetically sorted. The keymappings given here bind the command to ⌘-l, ⌘-r.

Default (OSX).sublime.keymap

[
  // Run LaTeX plugin to insert reference code
  {
  	"keys": ["super+l", "super+r"],
  	"command": "insert_latex_reference",
  	"context": [
              { "key": "selector", "operator": "equal", "operand": "text.tex.latex" }
             ]
  }
]

insert_latex_reference.py

import sublime, sublime_plugin
import re

class InsertLatexReferenceCommand( sublime_plugin.TextCommand ):
	
	def run(self, edit):
		labels = self.get_labels()
		self.view.window().show_quick_panel( self.labels, self.complete )

	def complete(self, choice):
		if choice == -1:
			return
		label = self.labels[ choice ]
		output_string = ( "\\ref{" + label + "}" )
		edit = self.view.begin_edit()
		startloc = self.view.sel()[-1].end()
		self.view.insert( edit, startloc, output_string )

	def get_labels(self):
		pattern = '^[^%]*label\{+([^\}]+)\}'
		fromPosition = 1
		self.labels = []
		self.view.find_all( pattern, 0, "$1", self.labels )
		if self.labels:
			return self.labels.sort
		else:
			return ''

LaTeX.sublime-commands

[
  { "caption": "LaTeX: Select reference label", "command": "insert_latex_reference" }
]