Wonderful Kontact!
I'm discovering that maintaining a growing application (both in size and in popularity), while fun, is also demanding of the old grey cells. Managing todo's and what's to be dones (we have a krita+todo and Cyrille is working on getting us all kolab accounts), incoming bugs, outgoing bugs, organizing a hackathon, contacting people who promised a bit of software but may have forgotten it, promises I made (that I may have forgotten all about)... Plans about publicity, all kind of stuff (1).
So I wanted a way to manage my todo's. I thought, well, maybe, if I mark a mail as TODO it'll show up in my kontact todo list. That didn't work, so I was all geared to enter a feature request, when I noticed that a similar thing had already been implemented.
If I drag a mail to the kontact TODO icon, a new todo item is created -- just what I needed, even better than my first idea. I love kontact!
1. That reminds me: next time KOffice has a big release, we need to get more publicity. One difficult to find review is not enough! LWN did a review of a beta, but LWN, Newsforge and Linux Journal should have been raving about KOffice...