It is common for software companies to have their own internal frameworks. These frameworks sometimes contain the whole software development life cycle, and sometimes it just boils down to a few tools and utilities.
Consider Temenos TAFJ framework as a case study, this framework has written in Java and can be considered as one of the most complete frameworks in the world it contains all aspect of software development requirements, it has its own data access layer, business layer, etc. plus it provides a special programing language for its developers to develop a new product in such platform.