GroupDocs
GroupDocs creates easy to use, comprehensive online document management APIs for .NET, Java and Cloud, as well as a range of Cloud apps that improve document collaboration for organizations of any size. GroupDocs saves developers and end users time and money by offering a complete and powerful set of document management APIs allowing users to view, sign, annotate, compare, convert and assemble documents in a wide variety of formats, including Microsoft Word, Excel, PowerPoint and Visio, as well as Adobe Acrobat PDF and many image formats. Flexible workflows and easy-to-use, customizable user interfaces are part of the package.
Iron Software
Iron Software produces quality software component products for C# / VB.Net. Iron’s philosophy puts developers at the heart of every piece of software released. Ease of installation and ease of use are their highest priorities, backed up by customer support directly from the development team. Iron are committed to building only the best examples of software in each niche with every release. Iron concentrate on 2 core product categories: Linguistic and language document software such as PDF and OCR, and Search technologies such as Iron WebScraper.
ActivePDF
ActivePDF provides a suite of easy to use, cost effective development tools for embedding feature-rich PDF functionality into server-based Windows applications. ActivePDF delivers robust, multithread, server-side PDF automation products which are intended for heavy-duty, enterprise-wide use. When you need it done now, need it done right, and need it every time, then ActivePDF provides the product, the support, and the level of confidence you need.