Hi

Here are some free courses for BCA :

1. Coursera : Google IT Support , CS50's Introduction to Computer Science .

2. edX : Introduction to Programming (Python) , CS50.

3. Udemy : Java Programming for Beginners , HTML/CSS/JS for Web Developers .

4. LinkedIn Learning : Java Essentials , Database Fundamentals .

5. Udacity : Intro to Programming (Free) .

6. FreeCodeCamp : Full Stack Developer Certification .

7. NPTEL : Computer Science Engineering courses .

8. Skill share : Data Structures and Algorithms basics .

These programming like web development , databases and algorithms , relevant to BCA .

For more details link mentions below :

https://www.careers360.com/courses-certifications/articles/list-of-certification-courses-along-with-bca

Thank you