Alternatives to Factor

Modern programming language in the Lisp/Scheme family

Programming language for technical computing

Writing system for interactive fiction based on natural language

Open-source code editor

Developer platform

Open source implementation of Microsoft's .NET Framework

Flexible software sketchbook and a language for learning how to code

IDE for professional Python development

Development environment, tooling platform and application framework

Family of tools to build, test and package software

Data science IDE

Developer platform