Hello Subham,
There is no definite college for such purpose. All you need is deep and thorough knowledge of this field. You must also aware with entrepreneurship scheme. You can easily start your own company or you can also go for freelancing. You must have good management skills, Entrepreneur skills, deep knowledge of your preferred field. This way you can found your own software company. For deep and thorough knowledge, you have to study hard in your graduation and post graduation.
Good Luck