
Mobile Java (J2ME) Apps
Please visit http://mobilecodes.nokia.com/scan.htm to learn about different mobile codes reader and how to install them. Then scan the code attached with each application on this site.
Android
Go to Settings->Applications, check Unknown sources. Download apk file typing its address in the adddress bar of the web browser. After download is finished click on the apk file entry on the downloads list.
You could also check some online tutorials:
http://www.youtube.com/results?search_query=how+to+install+apk