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.

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.

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

Checkvist helps you create and share online outlines, project plans, online checklists, and task lists.

Any.do is a life management and productivity app.

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

Azendoo is a project management & team collaboration platform.

Basecamp is a project management web app.

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

Clear is a tasks, reminders and To-Do lists app.