Read Ebook on Your PSP
You might think that PSP is just a gaming console. But the availability of custom firmware truly make it doing something beyond a normal game console can do. Not only it can play your backup game from your memory stick but you can install homebrew application. One of the homebrew that I found very useful is Bookr. Bookr is an ebook reader for PSP. The program is distributed under GNU General Public License (GPL). So its can be downloaded for free and without any extra charge.