You can develop a proof of decentralized concept application using Cartesi Rollups. For inspiration, you might want to use one of these components:
Decentralized SQLite.
Decentralized Geoprocessing library.
Cartesi Rollups asset deposit and withdrawal.
Decentralized OpenCV (Image Processing library).
Be creative. We encourage you to build novel applications using this stack without any constraints.
The easiest way to get started is to start building off of the Rollups examples. We want you to explore what can be built using Cartesi and these basic components.