OT - Vacation/Time Off Software

Just wondering if anyone knows of any good employee vacation/sick time
management software that might be out there in the OpenSource realm.

Looking for something that will keep track of time off accrual, carry-over,
along with a request and approval system.

I am looking at OrangeHRM right now, and while free and stable it just seems
way too robust for our needs.

Anyone? Bueller? Bueller?