Without a doubt: Google Skymaps and My Perfect Egg timer
The MOST perfect eggs your ever going eat LOL
I DL'd this as a laugh, but haven't tried it yet.
I'll add that I've been using:
iRT Calendar - syncs with Google, has icons (lord, how I miss my AgendusPro)
Contacts GroupU - No contact mgr yet satisfies me, as none allow you to view the entire physical address easily, but this is the closest I've come.
VidaOne's My Sport Training (Beta) - used this in Palm, interesting to see how it'll play out for Android
Public Radio Live Stream - they just keep adding stations, making this a handy little devil to have onboard.
aCar - unbelievably impressive. Great GUI, all the bells and whistles. I used TealAuto (Palm) for years. The only missing from this app is the ability to track a road trip (and associated expenses) and a parking meter timer. Developer is incredibly responsive and the app only gets better with each iteration.
Moonphase widget - I like keeping up with the moon, and this is one of the best I've found for Android. On Palm, I used Palmary Clock, which was incredibly elegant. This widget is fairly straightforward, but provides plenty of interesting facts about the various full moons of the year, and allows you to choose how far into the future it will schedule your moons.
SoundHound - a little pricey, but invaluable for catching that snippet of a song to determine who sings what. And endless fun for my niece/nephew to sing at it to try to stump it.
GTasks - syncs to Google calendar Tasks feature. Great for making various lists.