lz4net by: Milosz Krajewski

LZ4 is lossless compression algorithm, sacrificing compression ratio for compression/decompression speed. Its compression speed is ~400 MB/s per core while decompression speed reaches ~2 GB/s, not far from RAM speed limits. LZ4net brings LZ4 to all (most?) .NET platforms: .NET 2.0+, .NET Core, Mono, Windows Phone, Xamarin.iOS, Xamarin.Android and Silverlight

log4net by: The Apache Software Foundation

log4net is a tool to help the programmer output log statements to a variety of output targets. In case of problems with an application, it is helpful to enable logging so that the problem can be located. With log4net it is possible to enable logging at runtime without modifying the application binary. The log4net package is designed so that log statements can remain in shipped code without incurring a high performance cost. It follows that the speed of logging (or rather not logging) is crucial. At the same time, log output can be so voluminous that it quickly becomes overwhelming. One of the distinctive features of log4net is the notion of hierarchical loggers. Using these loggers it is possible to selectively control which log statements are output at arbitrary granularity. log4net is designed with two distinct goals in mind: speed and flexibility

KRE-CoreCLR-x86 by: Microsoft

The K Runtime Environment for CoreCLR x86

LibLog by: Damian Hickey

A source code package designed primarily for library and framework authors who want dependency free logging support in their component. Also useful in end applications. As of 5.0.0 it works with NetStandard2.0 and SDK projects. For legacy csproj format support use 4.x versions. If you are a library or framework author and you wish to provide logging support in your component there are a number of options: 1) Depend on a specific logging framework 2) Depend on Common.Logging 3) Implement your own ILog interface and make your consumers wire it up. Option 1 is not desirable because it forces your users to use a particular framework. Option 2 is not desirable because it will add yet more nuget package dependencies and project references with associated versioning concerns in addition to wiring up. Option 3 is desirable because it is dependency free but requires that your users to remember to write an adapter and wire things up. This package is a variation of option 3 but will automatically wire things up too. - It will add an ILog, ILogProvider etc to YourRootNamespace.Logging - ILog is one method to implement - Using optimized reflection, it transparently supports NLog, Log4Net, Serilog and Loupe without any wiring up required by an end user, if the end user simply has a reference to any of these logging frameworks.

LibGit2Sharp.NativeBinaries by: LibGit2Sharp contributors

Native binaries for LibGit2Sharp

LiteDB by: Maurício David

LiteDB - A lightweight embedded .NET NoSQL document store in a single datafile

Magicodes.EPPlus by: Magicodes

Create advanced Excel spreadsheets using .NET

LinqBridge by: Atif Aziz

With Visual Studio's multi-targeting and LINQBridge, you can write LINQ to Objects (local) queries using the full power of the C# 3.0 compiler and yet create programs that require only Microsoft .NET Framework 2.0. LINQBridge is a re-implementation of all the standard query operators introduced with Microsoft .NET Framework 3.5's System.Linq.Enumerable class.

Lextm.SharpSnmpLib by: Malcolm Crowe Lex Li and other contributors.

#SNMP (SharpSNMP) Library is an open source library for developers who target Microsoft .NET/Xamarin/Mono platforms. It's developed in C# and can be used for F#, VB.NET, Oxygene, and more.

knockoutjs by: The Knockout.js team

A JavaScript MVVM library to help you create rich, dynamic user interfaces with clean maintainable code

LightInject.Source by: Bernhard Richter

An ultra lightweight Inversion of Control container for the .Net framework. See LightInject.Source for the source distribution.

LiveCharts.Wpf by: Beto Rodriguez

Simple, flexible, interactive and powerful data visualization for Wpf

LibGit2Sharp by: LibGit2Sharp contributors

LibGit2Sharp brings all the might and speed of libgit2, a native Git implementation, to the managed world of .Net and Mono.

Libuv by: Libuv

Multi-platform support library with a focus on asynchronous I/O.

LightInject by: Bernhard Richter

An ultra lightweight single file Inversion of Control container for the .Net framework.

librdkafka.redist by: Magnus Edenhill edenhill

The Apache Kafka C/C++ client library - redistributable

Magnum by: Chris Patterson Dru Sellers

Magnum is a library for the larger than average developer

LinqKit.Core by: Joseph Albahari Tomas Petricek Scott Smith Tuomas Hietanen Stef Heyenrath

LinqKit.Core contains extensions for LINQ to SQL and Entity Framework. Note that Include(...), IAsync and IDbAsync are not supported.

log4net.Ext.Json by: Robert Cutajar Grzegorz Dziadkiewicz

Enable JSON logging in log4net.

KRE-CLR-x86 by: Microsoft

The K Runtime Environment for Desktop CLR x86