I read this book sometime in the mid-late 90s. It's set on other worlds and in space, mostly human characters.
What I remember:
- the female main character (FMC) has telepathic and telekinetic powers of unknown limit - regarded as strongest seen.
- there is a weapon on a spaceship that draws telekinetic power from FMC and sends bolts off to attacking spaceships. The telekinetic has to place her hands on plates that then draw the power from her. After use, the telekinetic collapses.
- I'm pretty sure this is part of the same story: there is a large lakeside residence that has an inventor's workshop (best description I can come up with) beneath it, alongside which is a "garage" for a spaceship. The spaceship is launched through the water.
- I believe there is some military involvement in the story.
This is definitely not an Anne McCaffrey book. I know those well.