VirtualEnv

This is a list of virtual environments that can be used for various languages, pull request are welcomed.

Python

• p - Dead Simple Interactive Python Version Management.
• pyenv - Simple Python version management.
• virtualenv - A tool to create isolated Python environments.
• virtualenvwrapper - A set of extensions to virtualenv.
• virtualenv-api - An API for virtualenv and pip.
• pew - A set of tools to manage multiple virtual environments.
• Vex - Run a command in the named virtualenv.
• PyRun - A one-file, no-installation-needed version of Python.

Ruby

• chgems - Chroot for RubyGems.
• chruby - Change your current Ruby. No shims, no crazy options or features, ~90 LOC.
• fry - Simple ruby version manager for fish.
• gem_home - A tool for changing your $GEM_HOME.
• rbenv - Use rbenv to pick a Ruby version for your application and guarantee that your development environment matches production.
• ruby-build - Compile and install Ruby.
• ruby-install - Installs Ruby, JRuby, Rubinius, MagLev or MRuby.
• RVM - RVM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems.
• Tokaido - Ruby, Rails, SQLite and Redis encapsulated in a single drag-and-drop OS X app, designed to make installing a working RoR environment easy for beginners.

Node

• n - Node version management.
• nave - Virtual Environments for Node.
• nodeenv - Virtual environment for Node.js & integrator with virtualenv.
• nvm - Node Version Manager (does not require prior installation of node).
• pm2 - Production process manager for Node.js / io.js applications.

Reference

1. Awesome-python
2. Awesome-Node
3. Awesome-Ruby