Evolution is the official personal information manager for GNOME.

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

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

GNOME System Monitor shows you what programs are running and how much processor time, memory, and disk space are being used.

Go For It is a simple and stylish productivity app, featuring a to-do list, merged with a timer that keeps your focus on the current task.

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

Zimbra Desktop is an offline client that lets you manage various email accounts in one desktop tool.

Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email.

ActiveInbox for Gmail is an email management software for Gmail.

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