I didn't work it on it directly (though I got to help out on some of the mecho-morph shots in Stargate), but my software was used a lot in Contact. That also was one of my favorite shots in the film, and a perfect example of something I noticed and people I was watching with didn't. "Did you SEE that? What? She opened the cabinet from the opposite side of the mirror! You're an idiot." That kind of stuff.
Another favorite scene was the long, "continuous" sequence where Ellie is driving in from the radio telescope array and then runs into the building, up the stairs, and into the control room and you can see the dishes out through the window. Since they couldn't shoot inside that building, there is an "invisible cut" when she opens the door and then they transition to a set, with the dishes composited in through the windows. Excellent! There are a bunch of effects shots like that, and Forrest Gump is FULL of them. I think my favorite effects shot in Gump was when Lt. Dan is on the floor on New Years Eve after falling out of his wheelchair. He shifts his legs around and gets back up in the chair, the entire time with that spool table in front of him. But when they shot that scene that table was never there, because his legs would have hit it. They did the same thing with the side of the boat when he swings around and jumps in. An entire section of the side of the boat was removed so he could do that in a "natural" way. Love that stuff!