Q: What is UML Sculptor?
A: See about page.

Q: What kind of UML diagrams does it support?
A: Only class diagrams for now.

Q: What version of UML does it support?
A: UML Sculptor was designed based on UML 1.1

Q: On what platforms does it work?
A: See requirements page.

Q: Can UML Sculptor generate code/documentation?
A: Not yet ;-)