 Since version 2.3 the framework has also been providing a "minimal mode" which enables it to act as a microframework for usage in environments where the whole stack is not required nor wanted.TurboGears is built on top of numerous disparate libraries and middleware.The default tools have changed between the 1.x, 2.x and 2.3+ series, but most of these components can be used in either as there is support for many alternative configurations.