One lifter, one bar, tons of variation. If all you've got is a bar and a rack, you can still get creative with variations of the main lifts.
Looking for even more options? Check out Stefan Waltersson's article "230 Max Effort Variations You Can Do With One Bar!"
And why not pick up an elitefts Power Bar for a true jack-of-all-trades bar with build quality that will outlast you!