Available from activePDF
Toolkit is a powerful PDF generator and manipulator. Toolkit offers both a flexible .NET-native API and intuitive administrative console making it easy to deploy and manage. Dynamically form-fill PDFs, extract data from user-completed forms, merge multiple PDFs into a single PDF, add bookmarks and more. Include digital signatures and automatic barcode generation. Merge, split and stitch PDFs. Stamp text, images and watermarks to PDF pages.