3rd party IP's I can think of....
Existing Healthy 3rd Party IPs here and/or coming soon:
Rabbids
Guitar Hero
Resident Evil
Madden
Tiger
Red Steel
Monster Hunter
Dragon Quest
Brothers in Arms
New 3rd Party IPs upcoming:
Endless Ocean
Project ODisaster Day of Crisis (This will still be an amazing series 1st party or not)
Boom Blox
No More Heroes
Force Unleashed (??new series but old IP, /shrug you can decided it doesn't matter)
Mushroom Men
Spore
De Blob
Ghostbusters
And those are just what I can think of off the top of my head.
Note: Exclusive games and games with Exclusive content bolded.