Free languagetool software for mac

LanguageTool is a rule-based language checker that will find errors for which a rule is defined in its XML configuration files. Rules for more complicated errors can be written in Java.
You can think of LanguageTool as a tool to detect errors that a simple spell checker cannot detect, e.g. mixing up there/their, no/now etc.
LanguageTool is also capable of detecting some grammar mistakes. LanguageTool does not include spell checking.

System requirements:
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- Java 5.0 or later