The CData ADO.NET Provider for QuickBooks gives developers the power to easily connect .NET applications to QuickBooks Desktop data, including Customers, Transactions, Invoices, Sales Receipts, Reports, and more! The QuickBooks Data Provider makes this QuickBooks Desktop data look like SQL tables in your applications. With the CData ADO.NET Provider for QuickBooks developers can simply DataBind to data, just like using SQL Server.

Optical character recognition library for Android. Use OCR.NET for Android to retrieve text from images.
uses Tesseract OCR engine and Leptonica image processing library
supports Android armeabi-v7a devices
source code included in full version
royalty free distribution in applications

PostSharp is the #1 pattern-aware extension to C# and VB. It allows developers to eradicate boilerplate by offloading repeating work from humans to machines. PostSharp contains ready-made implementations of the most common patterns and gives you the tools to build automation for your own patterns. Developers usually think in terms of design patterns, but with conventional programming languages, they end up writing boilerplate code. PostSharp extends the C# and VB languages with a notion of pattern. The result: shorter, cleaner code that’s easier to write and understand, contains fewer defects and is less expensive to maintain.

Nevron Vision for .NET offers the most comprehensive set of components for building enterprise-grade data visualization applications that target both the web and the desktop. The components in this suite feature coherent 2D and 3D data visualization effects that have a great visual impact on the audience. We have also implemented a large set of data visualization techniques and innovations to maximize the clarity of the visualized data and to make it more comprehensive for the viewer. The components are built upon a common framework, thus minimizing the learning curve needed to get started with them as a whole. The common framework also ensures consistent features, performance, polished API and other benefits that are a product of over a decade of refinement.

Deliver native Android, iOS, and Windows apps, with a single shared C# codebase

Share C# code across devices
Develop on Windows or OS X
Native performance and access to all native API’s
Native user interfaces
Easily connect with Microsoft Azure services

«Document .Net» will help you in development of applications which operates with DOCX, RTF, PDF and Text documents. After adding of the reference to "SautinSoft.Document.dll" (it's 100% C# managed assembly) you will be able to create a new document, parse an existing, modify anything what you want. Not too shabby! Let us say:

Generate new document on fly and fill it by necessary data.
Load existing document and get all it's structure as tree of objects.
Modify paragraph formatting, text, tables, TOC and other elements in existing document.
Parse the document and get the tree of its objects.
Replace, merge any data in documents and save as new DOCX, Text or RTF.
Convert between PDF, DOCX, RTF and Text.

With FastReport.Net, you can create application-independent .Net reports. In other words, FastReport.Net can be used as a standalone reporting tool.

Includes powerful visual report designer for creating and modifying the reports. Your application can run the designer from the code.
Includes online report designer for ASP.Net (only in Enterprise edition)
Connect to any database, use any of its tables or create queries
Add dialogue form(s) to your report to prompt for parameters before running a report
Using built-in script you can manage the interactions with dialogue form controls and perform complex data handling
Finally, view the result and print or export it to many common document formats

Use scalable bulk operations and always get the best performance available for your database provider.

SQL Server 2008+
SQL Azure
SQL Compact
MySQL
SQLite
PostgreSQL
Oracle (Coming soon)

Use flexibility of an Eval function in C# to build great dynamic application. C# developer doesn't have any more to be jealous of jаvascript Eval!

Anonymous Type
Extension Methods
Generic Type
Lambda Expression
LINQ
And more...

Windows 10 introduces the Universal Windows Platform (UWP), which provides a common app platform available on every device running Windows 10. Apps written with the UWP can call APIs common to all Windows 10 devices as well as APIs specific to the device family the app is running on. The UWP provides a guaranteed core API layer allowing you to create a single app package that can be installed on various Windows 10 devices. The upgraded Windows Store provides a unified distribution channel for reaching all desired device types. Telerik UI for Universal Windows Platform makes your Windows 10 development more productive offering easy implementation of complex functionalities.