Exceptionless - Don't let your users walk away in frustration.
Serilog - Backend Development and Utilities
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
RoRvsWild - All-in-one monitoring for Ruby on Rails applications. Track performances & errors for requests & background jobs.
LOGBack - Logging framework