Trello is a web based project management solution.

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

OmniFocus is a personal task manager.

Quire is a collaborative task management tool for breaking down goals in hierarchical lists.

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

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

Remember the Milk (RTM) is an application service provider for a Web-based task- and time-management.

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

Habitica (HabitRPG) is an online task management application.

Sandglaz's agile boards help you accomplish more with less stress.

Conqu is a simple yet powerful task management tool designed to help you conquer your inbox and get things done.

Azendoo is a project management & team collaboration platform.