What is leaking from my car?

I have a 2000 ford Taurus and when it is leaking a darker color fluid on the passenger side and it smokes and smell's bad when I'm driving it. It is leaking from a spot above my oil pan on the side of it but I don't know what it is above that. One really confusing thing is though, is my car engine oil is not dropping and neither is my transmission fluid. What could it be that it is leaking from so I can fix it?

I suspect you have a coolant leak. Check your radiator, hoses, and I hope not but you may have a cracked head or block or maybe a rusted out freeze plug. Have you checked your coolant level lately?