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 4.0 - 4.8
source code included in registered version
royalty free distribution in applications

Delphi and C++ Builder media recorder component for Android.

uses Android MediaRecorder API
provides audio and video recording
camera component is included
available for Delphi/C++ Builder XE5 - 10.3
source code included in full version
royalty free distribution in applications

Communication protocols 3964 and 3964R for .NET.
contains ComPort.NET serial communication component
supports .NET Framework 4.x
source code included in registered version
royalty free distribution in applications

Components for viewing, navigating, text extracting and editing PDF files.
uses PDFium open-source PDF rendering engine
available for .NET 4.0 - 4.7
source code included in registered version
royalty free distribution in applications

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