Node.js is mainly a Programming Language but alternatives to it may also be CMS Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Node.js.
ASP.NET vs Node.js opinions
pros, cons and recent comments
jamesnw Node.JS is a WEB type SERVER, NOT a programming language.
Very fast BASIC like programming language for console and gui applications, automate process, automate data exchange, connect to databases, send mails, ftp, rest api, parsing, tokenizing, files, OpenGl, graphics, sound, printing ... much more.
Rebol (historically REBOL) is a cross-platform data exchange language and a multi-paradigm dynamic programming language designed by Carl Sassenrath for network communications and distributed computing.
Hack is a programming language for HHVM that interoperates seamlessly with PHP. Hack reconciles the fast development cycle of PHP with the discipline provided by static typing, while adding many features commonly found in other modern programming languages.