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

Xamarin Forms is great if you want to develop apps for different mobile platforms. But when it comes to touch gestures, it is still very limited.
For more than a year they only had the TapGestureRecognizer. Although they did add some others lately, they still don't provide all information which you need. Furthermore the API which they use has been copied from iOS and is not what a .NET developer would expect.

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

Seamless access to cloud services from FireMonkey applications. The TMS FMX Cloud Pack contains components that offer integration with several cloud services.

It contains components and classes for Borland Delphi 7 – 2006, CodeGear Delphi 2007, RAD Studio 2009, Embarcadero RAD Studio 2010, XE - XE10.2, Lazarus (Win32), intended to increase capacity of the client part of database application in part of interaction with applications user.

DISQLite3 implements a self-contained, embeddable, zero-configuration SQL database engine for Delphi (Embarcadero / CodeGear / Borland).

Overview
ACID transactions, even after system crashes and power failures.
Zero-configuration – no setup or administration needed.
Implements most of SQL-92.
A complete database is stored in a single disk file.
Supports terabyte-sized databases and gigabyte-sized strings and blobs. Self-contained: no external dependencies, no DLLs.
Small footprint and smart linking: Only required code is compiled in, adding as little as 300 KB code space only.
Full Text Search (FTS) with customizable tokenizer, prefix matching, and optional word stemming for 15 languages.
Database AES encryption with SHA256 key generator.
Db.pas is not required, which allows DISQLite3 to compile with all flavours of Delphi, including Delphi Standard and Delphi Personal.
Faster than popular database engines for most common operations.
Simple, easy to use API.
Database files created with DISQLite3 can also be accessed by Linux and MacOS using the SQLite3 libraries.

In C++Builder 10.2.2, Embarcadero has added a new component to the FireDAC BatchMove architecture, to support generating JSON data from database tables, in an easy and flexible way. RAD Studio (Delphi and C++ Builder) has offered support for JSON in different ways and for a long time. From the JSON system unit (originally part of the DBX space) to the DataSnap table mapping (also via DBX) and to FireDAC tables to JSON mapping, there are many ways to interact with JSON data structures. As an enhancement, in the 10.2.2 release, we now added the capability to map a dataset to a custom JSON structure -- the FireDAC JSON support produces a FireDAC specific structure,metadataa data, and record status information.

Solution Overview: The RAD Server Field Service Industry Template provides an end-to-end field service application template for routing appointments, managing parts, and user administration. It is made up of a REST server module, a desktop client, and a cross platform mobile client.

Entity Developer is a powerful ORM designer for ADO.NET Entity Framework, NHibernate, LinqConnect, and LINQ to SQL. You can use Model-First and Database-First approaches to design your ORM model and generate C# or Visual Basic .NET code for it. It introduces new approaches for designing ORM models, boosts productivity, and facilitates the development of database applications.

Spire.Doc for .NET is a professional Word .NET library specifically designed for developers to create, read, write, convert and print Word document files from any .NET platform with fast and high quality performance.