Components for viewing, navigating, text extracting and editing PDF files.
uses PDFium open-source PDF rendering engine
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution in applications

Communication protocols 3964 and 3964R for .NET.
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution

.NET NFC library for Android.
uses Android NFC API
provides reading, writing and formatting NFC tags
supports NDEF, NFC-A, NFC-V, MIFARE Classic and MIFARE Ultralight tags
source code included in registered version
royalty free distribution in applications

Use OCR.NET component to retrieve text from image, for example from scanned paper document.

uses Tesseract OCR engine and Leptonica image processing library
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution in applications

ABCpdf .NET - PDF component for the creation and manipulation of Adobe PDF documents.

Free 30-day trial of full product, with free tech support!
Designed for web server and standalone applications
Comprehensive documentation, freely adaptable projects and example code
Use with ASP, ASP.NET, C#, VB.NET, and more

Ultimate FTP is a 100%-managed .NET class library that adds powerful and comprehensive File Transfer capabilities to your .NET applications including desktop (WinForms, WPF & Console), Web, Services and more. Makes it easy to transfer files between your application and Unix, Windows, and Mainframe FTP servers.

uses ZBar bar code reader library
supports EAN-13/UPC-A, EAN-8, UPC-E, Code 39, Code 93, Code 128, Codabar, PDF417, GS1 DataBar, GS1 DataBar Expanded, Interleaved 2 of 5 and QR Code barcodes
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution in applications

With .NET PDF Viewer Pro SDK , the developer can easily add search for text, continuous scroll pdf and tiff viewer capability to their applications with VB6, C#, VB.NET, VFP and more.

Add Gantt chart and scheduling capabilities to your .NET WPF application. ActiveGanttCSW can be used with practically any development environment and .NET language (VB.NET, managed C++, etc.) that supports WPF development. Use ActiveGanttCSW to build Gantt Charts, rosters, equipment/location rental, TV/Movie scheduling, and many other applications.

TVideoGrabber is a video capture/media player SDK for development of C#, VB, C++, Delphi, C++Builder, and ActiveX-compatible applications. TVideoGrabber captures and records video and audio streams from video capture devices supplied with a DirectShow driver like USB webcams, USB analog capture devices, HD PCI cards, desktop, as well as from set of bitmaps used as video source.