iPad Apps - iBooks

iBooks
A must have from Apple. Besides use it to read books you buy from iTune store, you can also add your own books (like PDFs) through iTune.
The animation of flipping pages is amazing.

Don't forget to get the free text book: Life on Earth (1G in size). 

You can rotate the DNS models using your finger in the book!

What I don't like is it takes a while to start this app. I don't know what Apple is doing during this time.

http://itunes.apple.com/ca/app/ibooks/id364709193?mt=8

My Favorite Android Apps (1)

iReader - for both phone and tablet. Similar to Apple iBook but can download free books in Chinese. 
Dolphin Broswer HD - for both phone and tablet. Can import your Google bookmarks.
ezPDF Reader - Best PDF reader I found so far. 
Dropbox - Easiest way to sync files
Duomi Music 多米音乐 - Free songs with synchronized lyrics.
搜狐视频 - for tablet Free movies and TV. Quality is pretty good.