The two most commonly cited tools in the community are:

For maximum safety, set your EA App or Steam client to "Offline Mode" while running trainers to ensure no data packets are cross-referenced with live servers during the modification process.

As the game has been out for a while, the modding community has stabilized. Here are the two primary tools you will encounter.

The most common complaint with NFS Unbound save editing is: "I gave myself $100 million, but after one race, I have $20,000 again!"