Collabtive Alternatives for Windows

Redmine is a flexible project management web application.

Wrike is an online project management software that gives you full visibility and control over tasks.

Ora is a real-time all-in-one workspace for teams.

Microsoft Project is a project management software product, developed and sold by Microsoft. It is designed to assist a project manager in developing a plan, assigning resources to tasks, tracking progress, managing the budget, and analyzing workloads.

Avaza is a beautiful online software suite with modules for Project Management, Timesheets, Expenses & Invoicing. Access from anywhere, with any device.

Bitrix24 is a free (for small businesses) social enterprise platform.

Drupal is a free and open source content-management framework written in PHP and distributed under the GNU General Public License.

TeamWox is a business collaboration software.

Mavenlink is an advanced project management, task collaboration, resource allocation, work management and professional services automation platform.

Dapulse is a smart collaboration and communication app you can use to get your team members working in sync in one place.

taskblitz is set of tools to collaboratively get your work done including project management, chat, time tracking and invoicing.

Hive.com is a productivity platform with powerful project management features.