Ruby language add-on
https://marketplace.visualstudio.com/items?itemName=rebornix.Ruby
Rails Asset Tag and Form Helper Snippets
https://marketplace.visualstudio.com/items?itemName=bung87.rails
Offline Spell Checker
https://marketplace.visualstudio.com/items?itemName=swyphcosmo.spellchecker
Markdown Preview Github Styling
https://marketplace.visualstudio.com/items?itemName=bierner.markdown-preview-github-styles
Bracket Pair Colorizer
https://marketplace.visualstudio.com/items?itemName=CoenraadS.bracket-pair-colorizer
vscode-icons
https://marketplace.visualstudio.com/items?itemName=robertohuertasm.vscode-icons