Office by: xuchonglei

Office

OpenHtmlToPdf by: Timo Vilppu

.NET library for rendering HTML documents to PDF format.

OpenLayers by: OpenLayers Team

Open source javascript based mapping API.

OpenTelemetry by: OpenTelemetry Authors

OpenTelemetry .NET SDK

OpenTelemetry.Api by: OpenTelemetry Authors

OpenTelemetry .NET API

OpenTelemetry.Exporter.OpenTelemetryProtocol by: OpenTelemetry Authors

OpenTelemetry protocol exporter for OpenTelemetry .NET

OpenTelemetry.Instrumentation.Http by: OpenTelemetry Authors

Http instrumentation for OpenTelemetry .NET

OpenTK by: Team OpenTK

The Open Toolkit is set of fast, low-level C# bindings for OpenGL, OpenGL ES, OpenAL and OpenCL. It runs on all major platforms and powers hundreds of apps, games and scientific research. It provides bindings for GLFW windowing, input and a game loop, and is the perfect start for your own game engine. OpenTK comes with simple and easy to follow tutorials for learning *modern* OpenGL. These are written by the community and represent all of the best practices to get you started. Learn how to use OpenTK here: https://opentk.net/learn/index.html Sample projects that accompany the tutorial can be found here: https://github.com/opentk/LearnOpenTK We have a very active discord server, if you need help, want to help, or are just curious, come join us! https://discord.gg/6HqD48s

OpenTK.GLControl by: The Open Toolkit Team

The Open Toolkit is set of fast, low-level C# bindings for OpenGL, OpenGL ES and OpenAL. It runs on all major platforms and powers hundreds of apps, games and scientific research. OpenTK provides several utility libraries, including a math/linear algebra package, a windowing system, and input handling.

OpenTK.GLWpfControl by: Team OpenTK

A native WPF control for OpenTK 4.X.

OpenTK.redist.glfw by: Team OpenTK

GLFW redistributables for OpenTK.

opentoolkit.redist.glfw by: OpenToolkit

GLFW redistributables for OpenTK.

OpenTracing by: The OpenTracing Authors

This library is a .NET implementation of the OpenTracing API. To fully understand this platform API, it's helpful to be familiar with the OpenTracing project and terminology more generally. For the time being, mild backwards-incompatible changes may be made without changing the major version number. As OpenTracing and opentracing-csharp mature, backwards compatibility will become more of a priority.

OpenWeatherMap by: Joan Caron

This project is a fully asynchronous .NET library for interacting with the great OpenWeatherMap API.

OpenXmlPowerTools by: Eric White

The Open XML PowerTools provides guidance and example code for programming with Open XML Documents (DOCX, XLSX, and PPTX). It is based on, and extends the functionality of the Open XML SDK. It supports scenarios such as: •Splitting DOCX/PPTX files into multiple files. •Combining multiple DOCX/PPTX files into a single file. •Populating content in template DOCX files with data from XML. •High-fidelity conversion of DOCX to HTML. •Searching and replacing content in DOCX/PPTX using regular expressions. •Managing tracked-revisions, including detecting tracked revisions, and accepting tracked revisions. •Updating Charts in DOCX/PPTX files, including updating cached data, as well as the embedded XLSX. •Retrieving metrics from DOCX files, including the hierarchy of styles used, the languages used, and the fonts used. •Writing XLSX files using far simpler code than directly writing the markup, including a streaming approach that enables writing XLSX files with millions of rows.

OpenXMLSDK-MOT by: Microsoft Open Technologies Inc.

https://github.com/OfficeDev/Open-XML-SDK

Oracle.ManagedDataAccess by: Oracle

ODP.NET, Managed Driver is a 100% native code .NET Framework driver for Oracle Database. No additional Oracle Client software is required to be installed to connect to Oracle Database.

org.matheval by: matheval.org

Matheval is a mathematical expressions evaluator library for .NET. Allows to evaluate mathematical, boolean, string and datetime expressions on the fly. Official document and usage examples: https://matheval.org/math-expression-eval-for-c-sharp/

Owin by: OWIN startup components contributors

OWIN IAppBuilder startup interface

PagedList by: Troy Goode

PagedList makes it easier for .Net developers to write paging code. It allows you to take any IEnumerable(T) and by specifying the page size and desired page index, select only a subset of that list. PagedList also provides properties that are useful when building UI paging controls.