vice (visual code editor) is a small vi-like editor. It is currently still a work in progress.
Simply running gem install vice-editor should be sufficient to install vice. You can then execute vice to start the editor.
vice can be configured by creating a file at ~/.vicerc. Your .vicerc should be a YAML file containing keys and fitting values as found in constants.rb. For an example, please look at the example .vicerc files in this repository.
Running: rake.
Tests: rake test.
Style: rake style.