log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.
AFSAnalytics - AFSAnalytics.
Logary - Professional logging metrics and analytics for your apps
Woopra - Track your customers' web and mobile activity, forms, emails, support tickets and more, all in one place with customer analytics. Analyze and take action.