PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
MySQL - The world's most popular open source database
AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.
SQLite - SQLite Home Page
Logary - Professional logging metrics and analytics for your apps