+1
I remember this was the first thing I was actually looking for when I started using Ableton. I didn't understand why they didn't have LFO's or atleast an LFO drawing tool, or a template to paste in or something... I can't draw worth crap.
LFO
and once again i can recommend this one: http://dunk.smartelectronix.com/
it is called "8LFOs" and should help you out over the time until Ableton is delivering Live with an own LFO...

it is called "8LFOs" and should help you out over the time until Ableton is delivering Live with an own LFO...

