If your application targets the ActiveX platform and you need to implement diagramming features than all you need is FlowChartX. It provides all the functionality to create, customize and render a flowchart.

Document .Net» gives you API to do everything with a document in PDF, DOCX, RTF, HTML and Text formats.

Allows to Create, Load, Edit, Merge, Sign digitally, Convert and a lot of actions with a document.
Single DOM (Document Object Model) for all formats.
Manipulate with Sections, Paragraphs, Tables, Lists, Text, Forms and Fields, Shapes, Pictures, Formatting, Document Properties, etc.
Requires only .NET Framework or .NET Core.
Absolutely standalone, 100% managed C# assembly.

EximiousSoft Logo Designer can also be used to customize high quality professional-looking business graphics such as such as business cards, letterheads, posters and other business stationery etc.. You can get access to a huge bank of well designed symbols to which you can apply a range of special gradients and effects. All objects and templates in this logo maker caters to a variety of businesses in most any industry, such as Technology, Finances, Healthcare, General Business and Retail, Education and Training, Travel and Tourism, Organizations, Sports and Fitness, Food and Beverage etc.. You can export logos to image files or print them from your own printer with high resolution.

Telerik UI for WinForms includes more than 90 user interface controls you can use to fulfill the most demanding desktop or tablet application requirements. All-way customizable GridView, Form, Chart, Scheduler, RichTextBox and other essential controls enable you to build any Line of Business or Modern application in less time while staying under budget.

Aspose.Slides for .NET is a Presentation Processing API for PowerPoint and OpenOffice formats. Aspose.Slides enables applications to read, write, protect, modify and convert presentations in .NET C#. Manage presentation text, shapes, charts, tables & animations, add audio & video to slides, preview slides.

TallPDF.NET is a 100% managed (verifiable) .NET class library for dynamic generation of PDF documents. Central to TallPDF.NET is a consistent and highly intuitive object model consisting of classes like Document, Section, TextParagraph, Table, Header, Footer, etc. The focus of the development team is always to ease the task of integrating our class libray in a larger application.

Aspose.Imaging for .NET is class library offering the advanced image processing features. Developers can create, edit, draw or convert images in their own application. Image export and conversion is the one of API core feature along with its ability to save in Adobe Photoshop native formats without having Photoshop application or any other image editor installed.

Logo Design Studio Pro Software. The #1 Selling Logo Design Software for 17 Years! You know your business, we know logos. Over the years, we’ve helped thousands of new and existing businesses create their logos by providing the tools, objects, inspirations, and guides needed to create a one-of-a-kind logo that is personal and professional. Logo Design Studio Pro has been the #1 best selling logo design software for over 17 years and we want you to get in on the action.

Standalone API to read, write, manipulate & convert PowerPoint files to PDF, PDF/A, XPS, TIFF, HTML, ODP and other formats. Aspose.Slides for .NET is a unique presentation processing API that enables applications to read, write, modify and convert PowerPoint presentations. Being a standalone API, It provides the functionality to manage PowerPoint key features such as managing text, shapes, tables & animations, adding audio and video to slides, previewing slides and more without requiring Microsoft PowerPoint.

TallPDF.NET is a 100% managed (verifiable) .NET class library for dynamic generation of PDF documents. Central to TallPDF.NET is a consistent and highly intuitive object model consisting of classes like Document, Section, TextParagraph, Table, Header, Footer, etc. The focus of the development team is always to ease the task of integrating our class libray in a larger application.