True open-source is more than just posting the source code on GitHub; it is defined by the community and its mentality.   During this talk I will focus on a different side of F# - the fantastic and productive software community dedicated to providing cross-platform open source tooling to make the life of every F# developer better.   I will shortly present tools such as Paket ( "A package dependency manager for .NET with support for NuGet packages and GitHub repositories"), FAKE (" "F# Make" is a build automation system with capabilities that extend far beyond Make and Rake."), the F# Yeoman Generator (which provides scaffolding of F# projects outside of Visual Studio), and how we have managed to integrate all of those tools with Atom and Visual Studio Code in the Ionide project. About Krzysztof: Krzysztof is full stack .Net developer creating applications with C#,  F# and TypeScript. In his free time, he is maintaining and contributing to several open sourced F# projects, is active member of F# online community, and tries to spread love to F# and functional programming speaking on local user groups and conferences.