https://marketplace.visualstudio.com/items?itemName=PKief.material-icon-theme.
Nice icon set for the file tree. Makes scanning for different file types really easy.
https://marketplace.visualstudio.com/items?itemName=wayou.vscode-todo-highlight.
Highlights things like @TODO and @FIXME in code comments.
https://marketplace.visualstudio.com/items?itemName=eg2.tslint.