What planets and moons have we seeded with life (if any)? Which planets and moons have we accidentally (or purposely) seeded with life?  I would expect this to be any planet or moon we have sent an unsterilized (or not fully sterilized) lander to, or crashed anything into.  

I am speaking largely of bacteria and other microorganisms that might have hitched a ride on our spacecraft, or any life that was deliberately taken to and left on another world (which I am not aware).  I know we went to the moon, we at the very least "seeded the moon" temporarily with life (humans) and probably bacteria on the space suits / lander / equipment we sent.

I wondering where we have "seeded" / brought life (even if it doesn't / didn't survive there).
This would seem to be constrained to planets and moons earth has landed on or impacted at all, as we have no way of telling after the fact whether a lander was perfectly sterilized. That list is as follows:

Planets:


Mercury: USA's MESSENGER in 2015 de-orbited and crashed upon completion of mission. Contamination is unlikely because of high impact and temperatures.
Venus: 13 missions by the USSR and 1 by the USA (1966-1985). Contamination unlikely due to harsh environment.
Mars: 12 missions, multi-national origins. Contamination plausible.
Jupiter: The Galileo missions (2), by the USA Contamination unlikely, because of pressure.


Moons:


Earth's moon: Far too many to count, myriad landings. Contamination plausible.
Saturn's moon Titan: Huygens probe, landed by the ESA (2005) Contamination Plausible.


Asteroids/Comets:


Eros: 2001 landing by USA. Contamination possible.
Itokawa: 2005 landing by Japan. Contamination possible.
Comet 9P/Tempel 1: 2005 landing by USA. Contamination is unlikely because of high impact speeds.
Comet 67P/Churyumov–Gerasimenko: 2014 landing by ESA. Contamination possible.