Alternatives to Factor

Modern programming language in the Lisp/Scheme family

Programming language for technical computing

Programming language for mathematical, statistical and logical analysis of data

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