i. Caché – Caché is an object database management system which is developed by InterSystems Corporation. First release date is October 2008. The company claims this is the world’s fastest object database. It is also application development tool.
ii. Objectivity/DB – Objectivity/DB is a commercial object database management system produced by Objectivity, Inc. It allows applications to make standard C++, Java, Python or Smalltalk objects persistent. First release date is 1990. Generally used in data intensive or real-time applications that manipulate highly complex, inter-related data.