A parallel or distributed application

1. Parallel implementation of a serial algorithm
2. Cloud infrastructure
3. Solving linear / nonlinear systems
4. Statistical calculations
5. Strings / numbers
6. Game: chess, go, etc.
7. Computer graphics
8. Image processing
9. Sound processing
10. Physical simulations (object movement, fluid simulations, etc.)
11. Real-time object detection / tracking
12. Identify similar images in a large database
13. Big data machine learning applications
14. Parallelization of a machine learning algorithm
15. Applications on large databases

You have only one restriction: to be a parallel or distributed application.