Bump! Spent some time with my little phony, so there is what I found useful:
Writer - simple application, it's just a notepad. You open it in a second and with one touch open any txt document and write whatever you want, this simplicity is awesome. I make every note on it, you just write and close the app
Playa Control for Winamp - the best free app to control winamp imo. It works via wifi. It's very useful for me, cause I have a netbook connected to my stereo, which is in my room, and when I turn it loud I hear the music in the whole house and outside, while sunbathing etc., and I can change songs, volume etc. very easily. You don't need anything special to run it, you just install a plugin on your pc and when you open winamp it already works.
Gmote - controls your PC. Acutally I use it only when I want to open a song from youtube on my stereo...
Go SMS Pro! - most useful app ever. It's an SMS manager, I downloaded it because it filtres polish letters from sms (I use polish letters on facebook etc., so I didn't want to turn them off for the whole phone, but when you use them in SMS it's sent in Unicode with a limit of 70 signs, instead of 145...) but I found out it has loads of fantastic functions. You can plan to send an sms on a particular time (useful in some situations
), you can set a reminder that bips every 5 mins if there is an unread message in your box. There are other functions too, but those are most useful.
SMS gate (polish application, its not a title) - this app sends SMS via SMS gates online, so it's free when you are on wifi. Very useful when I have to explain something and I write a sms for 6 pages - it's 100% free on wifi
Im sure there are apps like this for other countries.
CamScanner - Absolutely neccessary. It's a software that makes a photo of a paper, document etc. and sets contrast, light, colours etc. so that the letters, drawings and stuff are perfectly visible, and saves it as a PDF file. You can have many pages in one file. Believe me, it makes GREAT pictures of handnotes, documents, drawings or something in the screen of your pc. Pictures made with normal camera are shit compared to those.
Light - mine is called "latarka", but it's not a polish application, so you should find it easily by looking for a "light". It's awesome cause it has a widget, you can turn it on with one touch, and it works even after you lock your keyboard.
Sketch n Draw - funny drawing application, my friends love to play on it when they are bored waiting for a pizza
It has very funny drawing tools, even I can draw a masterpiece
Google Sky Map - it works with your compass, you can watch the stars constelations on your phone by moving it around. Believe it or not, but most of girls love it, lol.
AlarmDroid - nice alarm, you can set it so that it says the time loudly, and if you want to turn it off you have to solve a puzzle, a mathemathic equation or say what day of the week was yesterday
I have also some communication apps, bus and train timetables etc.
To sum up, Android rocks