Active Collab 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.

Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

Trac is an open source, Web-based project management and bug tracking system.

Mantis Bug Tracker is a free and open source, web-based bug tracking system. The most common use of MantisBT is to track software defects.

fluxday is a user-friendly, free & opensource task & productivity management tool for growing startups.

Paymo is an online project management app that helps deliver projects on budget and on time, by eliminating bottlenecks through accurate tracking and reporting.

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

GanttProject is free Java based, project management software that runs on the Windows, Linux and Mac OS X systems.

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.

Productive.io is a suite of tools to help businesses increase productivity like project management, time tracking tools.

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.

PMRobot is Project Management Software designed exclusively for Software Consulting Companies.

FogBugz is an integrated web-based project management system featuring bug/issue tracking, discussion forums, wikis, customer relationship management, and evidence based scheduling.

GNOME Planner is a cross-platform project management tool based on the Work breakdown structure (WBS).

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.

Rachota is a portable application for time tracking different projects.

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

LiquidPlanner is an innovative project management software.

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