ProBinder - ProBinder is your secured online teamwork platform to manage all of your work simply and securely.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Collanos - Collanos Workplace is a proprietary teamwork software that ceased development in 2010.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Projectfusion - Projectfusion is a virtual data room system that offers enterprises a single and centralized platform from which to set up data rooms, manage projects, collaborate and perform file sharing securely.
Slack - A messaging app for teams who see through the Earth!