For email, install Mozilla Thunderbird. It does everything MS Outlook does as far as sending and receiving emails, and I think perhaps a little smarter in organizing your mail, searching, and customizing. One caution: resist the temptation to import settings from other mail clients - it gets messy within Thunderbird.
You need the Lightning plugin to add task and calendaring features: download and save the .xpi, then from TB, install it using Tools | Add-ons. After TB restarts, viola! Il y a un calendrier.
Since I routinely work on more than 3 computers, I need them all to have my updated schedule at all times. For this, online calendars provide the needed synchronization link. If you use Google Calendar, you can set up Lightning to synchronize with it from Thunderbird, like this:
Download yet another plugin - the Provider for Google Calendar. After installing it as an add-on for Thunderbird and restarting:
- Open your Google Calendar from a web browser
- Click on Settings, then on the Calendars tab, click on your calendar.
- Scroll to the Private Address area (bottom) and right-click the XML link to copy its URL.
- In Thunderbird, select File | New | Calendar : On the network : Google Calendar (and paste the URL here) : provide credentials.