Radaee PDF Reader($39)
users can use it with unlimit times, but do not copy to others, and free for upgrad.

Radaee PDF Reader OCX($399)
users can release his products with OCX components widthout limits, and free for upgrad.

Radaee TXT View($29)
users can use it with unlimit times, but do not copy to others, and free for upgrad.

Radaee PDF Viewer SDK (Android 2.2)($399)
users can release his products with jni components widthout any limits once the user buy, and free for upgrad.