Highlights and jumps between [], (), and {}. Also highlights matching XML and HTML tags.

Autocompletes [], (), and {}, "", '', “”, ‘’, «», ‹›, and backticks.

You can toggle whether English/French style quotation marks (“”, ‘’, «» and ‹›) are autocompleted via the Autocomplete Smart Quotes setting in the settings view.

Use ctrl-m to jump to the bracket matching the one adjacent to the cursor. It jumps to the nearest enclosing bracket when there's no adjacent bracket,

Use ctrl-cmd-m to select all the text inside the current brackets.

Use alt-cmd-. to close the current XML/HTML tag.

Matching brackets and quotes are sensibly inserted for you. If you dislike this functionality, you can disable it from the Bracket Matcher section of the Settings view (cmd-,).