: A comprehensive guide for finding synonyms and improving your prose.

GoldenDict is an open-source, free dictionary application for Mac. It reads .mdx or .dsl dictionary files.

: Hover over a word and press Command + Control + D to see a quick pop-up definition.

You now have a legal, offline, high-speed Oxford Dictionary on your Mac, completely free. Combine this with a library card for access to the historical OED, and you have a world-class reference desk that no paid software can beat.

: Access to over 350,000 words, phrases, and meanings with 75,000 audio pronunciations.