It's a powerful PDF viewing application with a lot of features and options.
Read and write XLS, XLSX from ASP.NET, .NET, VB, C#, PHP and others
PDF To HTML SDK for .NET & ActiveX converts PDF2HTML without additional software
PDF Renderer SDK - new product to convert PDF to PNG, BMP, TIFF, EMF metafile
Decrypt and encrypt PDFs in your Win programs or Web applications.