Top 20 NuGet log4net Packages

Apache log4net appender for .NET Framework and .NET Standard/Core that writes to the Seq log server over HTTP.
Redistributable components for package 'PostSharp.Patterns.Diagnostics'. This package should only be installed as a dependency. (This is not the package you are looking for).
Castle log4net integration, logging services from Apache based on log4j
JavaScript logging package that lets you log exceptions, AJAX timeouts and other client side events in your server side log. Supports ASP.NET 4.x (.Net 4.5.2+) and ASP.NET CORE (.NETStandard 2.0+).
Unity adapter for log4net
Castle Windsor logging facility lets you easily inject loggers into your components. It offers integration with most popular 3rd party logging frameworks like log4net, NLog and Serilog (see Castle Core docs).
Adds detailed tracing to any method without modifying your source code. Several backends are available as separate NuGet packages. An official PostSharp pattern library.
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...
Shared library used by .NET log appenders uploading to Sumo Logic.
NLog appender which sends logs to the Sumo Logic machine data platform.
PostSharp.Patterns.Diagnostics: support for Log4Net.
Custom log4net Appender to send logs to Loggly
Log4net Logging extension for Ninject
Serilog event sink that writes to Log4Net. Merge your new Serilog event stream into your existing log4net infrastructure.
Log Audit.NET Audit Trail using Apache log4net™
Provides convenience methods to add browser screenshots to log2html report
Html report generator based on log4net records
log4net logging provider for WeihanLi.Common.Logging, and log4net extensions, see details
Provides log4net logging integration for other ServiceStack projects
Log JavaScript errors and other client side events in your Log4Net server side log. Installs JSNLog and configures it for use with Log4Net. Use with ASP.NET 4.x.