Mac OS X comes with built-in spell checking for many applications, but why stop there? Now you can have an integrated thesaurus as well. With Nisus Thesaurus you get a fast electronic thesaurus that automatically integrates with any service aware application including Nisus Writer Express, Mail, TextEdit, Safari, and more.
What is new in this release:
Signed with an Apple Developer ID so it runs on Mac OS X 10.8 and Gatekeeper.