Virtualenvwrapper is a set of command-line tools that enhance the functionality of Python's virtualenv. It provides a suite of utilities to manage multiple virtual environments more effectively by organizing them in one central location. Key features include commands for creating, deleting, and listing virtual environments, as well as simplifying the process of switching between them. By streamlining these operations, virtualenvwrapper improves workflow efficiency, especially for developers managing several projects with different dependencies.