usql - Universal command-line interface for SQL databases
Serilog - Backend Development and Utilities
Jugglingdb - Multi-database ORM for nodejs: redis, mongodb, mysql, sqlite3, postgresql, arango, in-memory... - 1602/jugglingdb
log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
Rollbar - Rollbar collects errors that happen in your application, notifies you, and analyzes them so you can debug and fix them. Ruby, Python, PHP, Node.js, JavaScript, and Flash libraries available.
LOGBack - Logging framework