What's your Andriod app recommendation?

Hi all,

I just treated myself to a new Dell Streak at the weekend - half price in Tesco!  Now I know it's a bit big for a phone, a bit small for a tablet - but that's exactly why it's right for me.  I barely use my phone as a phone - the occasional text, the occasional phone call from my partner - but mostly it's the replacment for my Palm PDA that I loved.  So, with a 5 inch screen to see my data clearly, but still small enough to fit all my handbags, it's the right choice for me.

Now, what I would like everyone's help with is Android app recommendations.  I had my Windows phone loaded with really just the essentials - so the thought of diving into the app stores and finding just what I need (or don't even know what I need) is a bit daunting.  So, if anyone has any recommendations for apps they have used (or even just heard they are good), in all categories:

Work-related

Technology-related

Life-organising

Fun and games - it is my phone, not a work one, after all!

Anything, really! Preferably free or faily cheap, if possible... Thanks for your help!

Wendy