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languagetool

LanguageTool is an Open Source proofreading software for English, French, German, Polish, Romanian, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect like mixing up there/their and it detects some grammar problems.
http://www.languagetool.org
GNU Lesser General Public License
Daniel Naber Marcin Miłkowski
Files download
File Operation
languagetool-2.0.1.jar download
languagetool-2.0.1.pom download
languagetool-2.0.1-sources.jar download
Apache Maven
<dependency>
  <groupId>org.languagetool</groupId>
  <artifactId>languagetool</artifactId>
  <version>2.0.1</version>
</dependency>
Gradle Groovy
implementation 'org.languagetool:languagetool:2.0.1'
Gradle Kotlin
implementation("org.languagetool:languagetool:2.0.1")
Scala SBT
libraryDependencies += "org.languagetool" % "languagetool" % "2.0.1"
Groovy Grape
@Grapes(
  @Grab(group='org.languagetool', module='languagetool', version='2.0.1')
)
Apache Ivy
<dependency org="org.languagetool" name="languagetool" rev="2.0.1" />
Leiningen
[org.languagetool/languagetool "2.0.1"]
Apache Buildr
'org.languagetool:languagetool:jar:2.0.1'