I have just SBSettings and DoNotDisturb. Everyone probably already knows SBSettings, but DoNotDisturb is an awesome Notification Center widget, that allows you to disable and able all notifications by a single button. It's awesome, for example, at nights, if you need to keep phone's ringer on, but you don't want to wake up because of some notification. I recommend DoNotDisturb for everyone, it's great.
We have a very very long way to go in comparison to Android's widgets but I like: WeeKillBackground, QuickNote and SBSettings (w/ Serious SBSettings HD Theme)