I got one from this forum similar to this, with a few differences.A fun hitting game my team liked last summer was line drive or out.
Line the team up along the fence with helmets and bats.
1 hitter is up, she stays as long as she hits fair ball line drives, everything else is a out and you move to the back of the line. (you can adjust the "safe/out" for whatever level your team is)
Moves pretty quick and you need at least 2 full buckets of balls, 3 or 4 is better.
When you run out of balls it's time to pick them up. Found it a good way to end pratcie.