Force fields.
Force fields exist everywhere, but they really are different from what you are probably imagining in a science fiction sense. There are some things that have some of the properties ascribed, (magnetically contained plasma sheets being an example) but they require massive energy and probably couldn't be implemented in a manner seen in science fiction.
Time travel (Forwards only)
Well, that already happens.
Time travel (Forwards and backwards)
I doubt it, every proposed physical mechanism requires assumptions outside of mainstream physics.
Gravity generation.
GR demonstrates that acceleration and gravity are really one in the same, so it's pretty easy to generate gravity by spinning something. One could also devise something that uses Electromagnetism to simulate gravity. However, the grav-plating on all those Sci-fi shows is utter fiction.
Intersteller travel.
Certainly feasible under current understanding, mostly an engineering challange.
FTL travel.
I doubt it, like time travel, every proposed physical mechanism requires assumptions outside of mainstream physics.
Teleportation.
Been done, but I doubt one could teleport things much larger then a molecule.
Terraforming.
Sure, could be done, would probably take a long long time to do though.
Fusion power.
Quite plausible, we're nearing the point where we break even energetically. However, economic viability is a whole different ball-game.
Blackhole generation.
Certainly possible, if nature can do it, so can we. The question is how hard is it for us to do, and can we make small ones in labs. I don't have sufficient knowledge to answer that questino.
Other.
I think the most outlandish is the technology that we could use to alter ourselves. It's only a matter of time before we'll have the technology to enhance our mental capabilities significantly, the cultural impliciations of this is fascinating.