After failing to find anything similar, I wrote PythonTraceback: plugin for ST2/ST3 for navigating in python tracebacks. It gives you a shortcut (Ctrl+t, Ctrl+v) to paste a traceback from clipboard to new scratch buffer, highlights it, marks lines with current project files in it and allows to jump to any referenced file (with Alt-d). Also, you can jump up and down (with Alt-k and Alt-j) in the current traceback without going back to traceback window.
Check it out at Package Control or GitHub.
Let me know what you think.