TWiki is a flexible, powerful, secure, yet simple web-based enterprise collaboration platform. It can be used to run a project development space, a document management system, a knowledge base or any other groupware tool on either an intranet or on the Internet. It has over 400 extensions, and it is perfectly suit for users who want to create web applications without any programming skills. It is being actively used by 50,000 small businesses, many Fortune 500 companies, and millions of people around the globe, with installations of 100,000s of pages.