Serilog - Backend Development and Utilities

Errbit - The open source error catcher that's Airbrake API compliant

Logmatic - Logmatic is a log centralization, analytics & visualization platform to improve software & business performance.

SQLAlchemy - SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.

LogTailApp - LogTail is a local and remote (SSH) log file viewer and monitoring application for Mac OS X. It is a pure, modern, document-based Cocoa App

SqlPad - Run SQL in your browser and chart the results