Sourcing Pre-developed Bank Applications

I am looking for pre-developed bank applications to incorporate into my software catalogue. Key specifics include:

- Program Language: Applications can be in any programming language, with a specific interest in Java, C#, and Python variations.

- Core Functionalities: I'm particularly interested in bank applications with functionalities for account management, transaction processing, and customer support. However, I am open to considering applications that have other features.

- Additional Functionalities: Ideally, applications will already include features for online banking, ATM integration, and mobile banking.

In summary, I am looking for applications with robust capabilities that are ready to be integrated into my existing catalogue. If you have developed such an application and can include the source code, please get in touch.

Ideal skills and experience:
- Prior experience in creating banking applications.
- Strong knowledge in Java, C#, Python or other languages.
- Proven track record of delivering fully functional software packages including source code.