Well, there's a free software resource that's provided by the Graduate Management Admission Council® (GMAC®). It's called GMATPrep and you can download the free software by clicking here.
If you're a physician and you don't want to study for the GMAT, then you have the option of applying to MBA programs that will waive the GMAT since you have a terminal degree.
GMATPrep software features:
- A 15-question practice section for each type of GMAT question, with answers and explanations for each question
- 2 full-length computer adaptive practice tests with answers (detailed explanations of answers are not included)
- Accurate computing of Verbal and Quantitative scores, which you can use to judge how prepared you are for the actual GMAT exam
- A comprehensive math review
- Real-time scoring