This is my first blog to the planet, so be gentle :)
I'm maintaining "System Activity" aka "System Monitor" aka "ksysguard" aka "KDE version of Windows Task Manager". It's the thing that pops up when you press ctrl+esc or press in krunner.
For 4.4, I focused mostly stability - about a dozen bug reports were fixed. But we also have a few cool features. My favourite is actually the simplest - it shows processes that have died as grayed out. Like so:
This looks really cool when you're compiling something and you can see the gcc instances coming and going.
We also have some new columns that can be shown, display I/O statistics for example. This is really cool, you can see exactly how much each process has read or written to the hard disk, with many options on how to view the information.
We also have a nice increase in speed for the graphs - that made it in just in time for 4.4. I measured an improvement from 50ms per frame to 10ms per frame for a QWidget and 15ms for a QGraphicsWidget. The process list has also seen some performance increases - nothing quite so major, but every little helps. The plasma signalplotter widget, unfortunately, doesn't benefit from this, but it will in KDE 4.5. I couldn't get this done in time.
Also I did quite a bit of polishing. Note the lack of margins in the dialog box - this requires doing a few tricks with KDialog. First, you have to force KDialog to create its inner layout by calling
minimumSizeHint(), before setting the contents margins to 0. Like so:
(void)minimumSizeHint(); //Force the dialog to be laid out now
Then to get a nice resize-handle grip, we have to 'trick' the QTreeView into allocating the space for it, so that the scrollbars are properly offset. Like: