PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
Serilog - Backend Development and Utilities
AbTest.io - A free url shortener with A/B testing features
log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
Marpipe - Automate Your Ad Testing, Optimize Your Creative
LOGBack - Logging framework