I love programming languages, at the last count, I have written commercial software in over 10+, throughout my career and have dabbled with 20+. These pages are my crib sheets for each language I use or enjoy playing with. Some are complete, and some are works in progress but the list will build over time to include not just the core language features but how to use them if different scenarios such as REST APIs, data structure and algorithms, application development and tools and utilities.