Microsof Encarta 2008 is a great encyclopedia that furnishes information on all the Nations of the world.
Information, for every Nation, on:
-Flag
-Map
-Introduction
-Geography
-People
-Government
-Economy
-Communications
-Transportation
-Military
-Transnational Issues
Compatible with java phones, At least 6 Mb is required to run.

Download Link:

http://www.ziddu.com/download/3433265/MicrosoftEncarta2008.zip.html