Logging Frameworks

For some reason David Brabant just wrote a post about NLog, another logging library for .Net, sadly last updated during 2006.
This tool joins the well known Log4Net (also long time since last sign of life), Raize's commercial CodeSite 4.1 (excellent tool from personal experience), Gurock's SmartInspect (also commercial), Enterprise library's Logging application block, and various other OSS logging frameworks.