Redmine

Every user should have the ability to create a company, in which he can create his / her own projects.

This is very useful for multi company cooperations, where each company has very similiar sounding projects,
and have to be kept seperated. If the projects assigned to companies, projects with similiar names won't be in conflict anymore.

Project "Ant" from Company "Riff" wont collide with Project "Ant" from Company "Hospital Farming".
Both projects have the same name, but different companies.