Social Source Commons

A unified, extensible interface for working with applications, contacts, music, and other data.

Excellent free web-based tool to coordinate meetings between many people without wading through emails.

Desktop spreadsheet and data analysis application.

On-line payroll solution for small businesses.

Office productivity suite.

Open Source collaborative software platform for file sharing (documents, images, media files, etc.), task and project management, team collaboration and Wiki editing

A productivity client following the "Getting Things Done" methodology that integrates with dozens of other OS X apps.

Blackens out your desktop so that you concentrate on what you need to get done.

Web Collaboration and Online Intranet Software

Qliner hotkeys is a free and open source keyboard productivity environment.

Visual goal management software. Designed, built and used by Olympic athletes and coaches. Designed to enable users to be more focused, set goals easily and elegantly, capture and manage know-how, develop strategies rapidly, evaluate and track progress, improve communication and teamwork, make the best use of your time.

Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.