1 Ophelia: Mercutio, can you fix those spec issues I logged? Don't forget, it needs to be done by Friday.
2 Mercutio: Sure. Let me put it on my Outlook task list.
3 Ophelia: You keep a task list in Outlook?! I didn't think you'd organise your work to that degree, especially with a Microsoft product.
4 Mercutio: Oh, no, I love it. Mr Marlowe checks them. It improves my "appearance of productivity" immensely.

At my work we've switched from Outlook calendar (which really, truly sucked) to Oracle calendar for keeping track of meetings and appointments. Although the calendar system is a big improvement, I actually miss Outlook's task tracking system. Oracle calendar has one too, but it doesn't have many of the features I regularly used in Outlook.

Oh, and if my boss is reading this.... it's a joke!

---

2015-06-02 Rerun commentary: Huh. Well, at some point my work switched back from using Oracle Calendar to using Microsoft Outlook as our calendar system. The good news is I can now use Outlook for my task tracking at work, and I still appreciate its features more.

The really odd thing is I think we switched back to Outlook because we discovered that Oracle's calendar system sucked too, only in different ways.

Software: Does what you want; Written by someone else. Pick one.