PMRobot Alternatives for Mac OS X

Redmine is a flexible project management web application.

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

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.

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

Active Collab is a web-based project management tool.

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

buckets.co helps you optimize workflows & collaboration at all levels.

VivifyScrum is a single page app for agile project management and collaboration.

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