2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface.

Active Collab is a web-based project management tool.

Airtable is a spreadsheet-database hybrid i.e., the features of a database are applied to a spreadsheet.

Artia is a project management, teams and productivity software platform.

Assembla is the leading provider for SVN and Perforce hosting and has task management features built into it's platform.

Awesome notes is a powerful text and voice note taking application with many great features.

5pm is a Web-based project and task management software.

Aimtracker.com a Time/Goal Management Social Service aims to encourage users setup and achieve their goals.

Any.do is a life management and productivity app.

Asana is a web and mobile application designed to help teams track their work.

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

BamBam! is a project management software with integrated time tracking, Agile support, source & deploy, custom workflows and more.